20648880

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{241}}^1$

素因数の和:284

約数の個数: 240

約数和(自身を含む): 84262464

約数和(自身を除く): 63613584

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 17, 18, 20, 21, 24, 28, 30, 34, 35, 36, 40, 42, 45, 48, 51, 56, 60, 63, 68, 70, 72, 80, 84, 85, 90, 102, 105, 112, 119, 120, 126, 136, 140, 144, 153, 168, 170, 180, 204, 210, 238, 240, 241, 252, 255, 272, 280, 306, 315, 336, 340, 357, 360, 408, 420, 476, 482, 504, 510, 560, 595, 612, 630, 680, 714, 720, 723, 765, 816, 840, 952, 964, 1008, 1020, 1071, 1190, 1205, 1224, 1260, 1360, 1428, 1446, 1530, 1680, 1687, 1785, 1904, 1928, 2040, 2142, 2169, 2380, 2410, 2448, 2520, 2856, 2892, 3060, 3374, 3570, 3615, 3856, 4080, 4097, 4284, 4338, 4760, 4820, 5040, 5061, 5355, 5712, 5784, 6120, 6748, 7140, 7230, 8194, 8435, 8568, 8676, 9520, 9640, 10122, 10710, 10845, 11568, 12240, 12291, 13496, 14280, 14460, 15183, 16388, 16870, 17136, 17352, 19280, 20244, 20485, 21420, 21690, 24582, 25305, 26992, 28560, 28679, 28920, 30366, 32776, 33740, 34704, 36873, 40488, 40970, 42840, 43380, 49164, 50610, 57358, 57840, 60732, 61455, 65552, 67480, 73746, 75915, 80976, 81940, 85680, 86037, 86760, 98328, 101220, 114716, 121464, 122910, 134960, 143395, 147492, 151830, 163880, 172074, 173520, 184365, 196656, 202440, 229432, 242928, 245820, 258111, 286790, 294984, 303660, 327760, 344148, 368730, 404880, 430185, 458864, 491640, 516222, 573580, 589968, 607320, 688296, 737460, 860370, 983280, 1032444, 1147160, 1214640, 1290555, 1376592, 1474920, 1720740, 2064888, 2294320, 2581110, 2949840, 3441480, 4129776, 5162220, 6882960, 10324440, 20648880]

約数ペア:

[(1, 20648880), (2, 10324440), (3, 6882960), (4, 5162220), (5, 4129776), (6, 3441480), (7, 2949840), (8, 2581110), (9, 2294320), (10, 2064888), (12, 1720740), (14, 1474920), (15, 1376592), (16, 1290555), (17, 1214640), (18, 1147160), (20, 1032444), (21, 983280), (24, 860370), (28, 737460), (30, 688296), (34, 607320), (35, 589968), (36, 573580), (40, 516222), (42, 491640), (45, 458864), (48, 430185), (51, 404880), (56, 368730), (60, 344148), (63, 327760), (68, 303660), (70, 294984), (72, 286790), (80, 258111), (84, 245820), (85, 242928), (90, 229432), (102, 202440), (105, 196656), (112, 184365), (119, 173520), (120, 172074), (126, 163880), (136, 151830), (140, 147492), (144, 143395), (153, 134960), (168, 122910), (170, 121464), (180, 114716), (204, 101220), (210, 98328), (238, 86760), (240, 86037), (241, 85680), (252, 81940), (255, 80976), (272, 75915), (280, 73746), (306, 67480), (315, 65552), (336, 61455), (340, 60732), (357, 57840), (360, 57358), (408, 50610), (420, 49164), (476, 43380), (482, 42840), (504, 40970), (510, 40488), (560, 36873), (595, 34704), (612, 33740), (630, 32776), (680, 30366), (714, 28920), (720, 28679), (723, 28560), (765, 26992), (816, 25305), (840, 24582), (952, 21690), (964, 21420), (1008, 20485), (1020, 20244), (1071, 19280), (1190, 17352), (1205, 17136), (1224, 16870), (1260, 16388), (1360, 15183), (1428, 14460), (1446, 14280), (1530, 13496), (1680, 12291), (1687, 12240), (1785, 11568), (1904, 10845), (1928, 10710), (2040, 10122), (2142, 9640), (2169, 9520), (2380, 8676), (2410, 8568), (2448, 8435), (2520, 8194), (2856, 7230), (2892, 7140), (3060, 6748), (3374, 6120), (3570, 5784), (3615, 5712), (3856, 5355), (4080, 5061), (4097, 5040), (4284, 4820), (4338, 4760)]