20871760

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1$

素因数の和:141

約数の個数: 160

約数和(自身を含む): 61996032

約数和(自身を除く): 41124272

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 47, 52, 56, 61, 65, 70, 80, 91, 94, 104, 112, 122, 130, 140, 182, 188, 208, 235, 244, 260, 280, 305, 329, 364, 376, 427, 455, 470, 488, 520, 560, 610, 611, 658, 728, 752, 793, 854, 910, 940, 976, 1040, 1220, 1222, 1316, 1456, 1586, 1645, 1708, 1820, 1880, 2135, 2440, 2444, 2632, 2867, 3055, 3172, 3290, 3416, 3640, 3760, 3965, 4270, 4277, 4880, 4888, 5264, 5551, 5734, 6110, 6344, 6580, 6832, 7280, 7930, 8540, 8554, 9776, 11102, 11468, 12220, 12688, 13160, 14335, 15860, 17080, 17108, 20069, 21385, 22204, 22936, 24440, 26320, 27755, 28670, 31720, 34160, 34216, 37271, 40138, 42770, 44408, 45872, 48880, 55510, 57340, 63440, 68432, 74542, 80276, 85540, 88816, 100345, 111020, 114680, 149084, 160552, 171080, 186355, 200690, 222040, 229360, 260897, 298168, 321104, 342160, 372710, 401380, 444080, 521794, 596336, 745420, 802760, 1043588, 1304485, 1490840, 1605520, 2087176, 2608970, 2981680, 4174352, 5217940, 10435880, 20871760]

約数ペア:

[(1, 20871760), (2, 10435880), (4, 5217940), (5, 4174352), (7, 2981680), (8, 2608970), (10, 2087176), (13, 1605520), (14, 1490840), (16, 1304485), (20, 1043588), (26, 802760), (28, 745420), (35, 596336), (40, 521794), (47, 444080), (52, 401380), (56, 372710), (61, 342160), (65, 321104), (70, 298168), (80, 260897), (91, 229360), (94, 222040), (104, 200690), (112, 186355), (122, 171080), (130, 160552), (140, 149084), (182, 114680), (188, 111020), (208, 100345), (235, 88816), (244, 85540), (260, 80276), (280, 74542), (305, 68432), (329, 63440), (364, 57340), (376, 55510), (427, 48880), (455, 45872), (470, 44408), (488, 42770), (520, 40138), (560, 37271), (610, 34216), (611, 34160), (658, 31720), (728, 28670), (752, 27755), (793, 26320), (854, 24440), (910, 22936), (940, 22204), (976, 21385), (1040, 20069), (1220, 17108), (1222, 17080), (1316, 15860), (1456, 14335), (1586, 13160), (1645, 12688), (1708, 12220), (1820, 11468), (1880, 11102), (2135, 9776), (2440, 8554), (2444, 8540), (2632, 7930), (2867, 7280), (3055, 6832), (3172, 6580), (3290, 6344), (3416, 6110), (3640, 5734), (3760, 5551), (3965, 5264), (4270, 4888), (4277, 4880)]