21579880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{2083}}^1$

素因数の和:2138

約数の個数: 64

約数和(自身を含む): 57018240

約数和(自身を除く): 35438360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 37, 40, 56, 70, 74, 140, 148, 185, 259, 280, 296, 370, 518, 740, 1036, 1295, 1480, 2072, 2083, 2590, 4166, 5180, 8332, 10360, 10415, 14581, 16664, 20830, 29162, 41660, 58324, 72905, 77071, 83320, 116648, 145810, 154142, 291620, 308284, 385355, 539497, 583240, 616568, 770710, 1078994, 1541420, 2157988, 2697485, 3082840, 4315976, 5394970, 10789940, 21579880]

約数ペア:

[(1, 21579880), (2, 10789940), (4, 5394970), (5, 4315976), (7, 3082840), (8, 2697485), (10, 2157988), (14, 1541420), (20, 1078994), (28, 770710), (35, 616568), (37, 583240), (40, 539497), (56, 385355), (70, 308284), (74, 291620), (140, 154142), (148, 145810), (185, 116648), (259, 83320), (280, 77071), (296, 72905), (370, 58324), (518, 41660), (740, 29162), (1036, 20830), (1295, 16664), (1480, 14581), (2072, 10415), (2083, 10360), (2590, 8332), (4166, 5180)]