21091560

素因数分解:

$2^3\times 3^1\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{211}}^1$

素因数の和:256

約数の個数: 192

約数和(自身を含む): 78304320

約数和(自身を除く): 57212760

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 17, 20, 21, 24, 28, 30, 34, 35, 40, 42, 49, 51, 56, 60, 68, 70, 84, 85, 98, 102, 105, 119, 120, 136, 140, 147, 168, 170, 196, 204, 210, 211, 238, 245, 255, 280, 294, 340, 357, 392, 408, 420, 422, 476, 490, 510, 588, 595, 633, 680, 714, 735, 833, 840, 844, 952, 980, 1020, 1055, 1176, 1190, 1266, 1428, 1470, 1477, 1666, 1688, 1785, 1960, 2040, 2110, 2380, 2499, 2532, 2856, 2940, 2954, 3165, 3332, 3570, 3587, 4165, 4220, 4431, 4760, 4998, 5064, 5880, 5908, 6330, 6664, 7140, 7174, 7385, 8330, 8440, 8862, 9996, 10339, 10761, 11816, 12495, 12660, 14280, 14348, 14770, 16660, 17724, 17935, 19992, 20678, 21522, 22155, 24990, 25109, 25320, 28696, 29540, 31017, 33320, 35448, 35870, 41356, 43044, 44310, 49980, 50218, 51695, 53805, 59080, 62034, 71740, 75327, 82712, 86088, 88620, 99960, 100436, 103390, 107610, 124068, 125545, 143480, 150654, 155085, 175763, 177240, 200872, 206780, 215220, 248136, 251090, 301308, 310170, 351526, 376635, 413560, 430440, 502180, 527289, 602616, 620340, 703052, 753270, 878815, 1004360, 1054578, 1240680, 1406104, 1506540, 1757630, 2109156, 2636445, 3013080, 3515260, 4218312, 5272890, 7030520, 10545780, 21091560]

約数ペア:

[(1, 21091560), (2, 10545780), (3, 7030520), (4, 5272890), (5, 4218312), (6, 3515260), (7, 3013080), (8, 2636445), (10, 2109156), (12, 1757630), (14, 1506540), (15, 1406104), (17, 1240680), (20, 1054578), (21, 1004360), (24, 878815), (28, 753270), (30, 703052), (34, 620340), (35, 602616), (40, 527289), (42, 502180), (49, 430440), (51, 413560), (56, 376635), (60, 351526), (68, 310170), (70, 301308), (84, 251090), (85, 248136), (98, 215220), (102, 206780), (105, 200872), (119, 177240), (120, 175763), (136, 155085), (140, 150654), (147, 143480), (168, 125545), (170, 124068), (196, 107610), (204, 103390), (210, 100436), (211, 99960), (238, 88620), (245, 86088), (255, 82712), (280, 75327), (294, 71740), (340, 62034), (357, 59080), (392, 53805), (408, 51695), (420, 50218), (422, 49980), (476, 44310), (490, 43044), (510, 41356), (588, 35870), (595, 35448), (633, 33320), (680, 31017), (714, 29540), (735, 28696), (833, 25320), (840, 25109), (844, 24990), (952, 22155), (980, 21522), (1020, 20678), (1055, 19992), (1176, 17935), (1190, 17724), (1266, 16660), (1428, 14770), (1470, 14348), (1477, 14280), (1666, 12660), (1688, 12495), (1785, 11816), (1960, 10761), (2040, 10339), (2110, 9996), (2380, 8862), (2499, 8440), (2532, 8330), (2856, 7385), (2940, 7174), (2954, 7140), (3165, 6664), (3332, 6330), (3570, 5908), (3587, 5880), (4165, 5064), (4220, 4998), (4431, 4760)]