21736120

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{521}}^1$

素因数の和:688

約数の個数: 64

約数和(自身を含む): 56376000

約数和(自身を除く): 34639880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 149, 280, 298, 521, 596, 745, 1042, 1043, 1192, 1490, 2084, 2086, 2605, 2980, 3647, 4168, 4172, 5210, 5215, 5960, 7294, 8344, 10420, 10430, 14588, 18235, 20840, 20860, 29176, 36470, 41720, 72940, 77629, 145880, 155258, 310516, 388145, 543403, 621032, 776290, 1086806, 1552580, 2173612, 2717015, 3105160, 4347224, 5434030, 10868060, 21736120]

約数ペア:

[(1, 21736120), (2, 10868060), (4, 5434030), (5, 4347224), (7, 3105160), (8, 2717015), (10, 2173612), (14, 1552580), (20, 1086806), (28, 776290), (35, 621032), (40, 543403), (56, 388145), (70, 310516), (140, 155258), (149, 145880), (280, 77629), (298, 72940), (521, 41720), (596, 36470), (745, 29176), (1042, 20860), (1043, 20840), (1192, 18235), (1490, 14588), (2084, 10430), (2086, 10420), (2605, 8344), (2980, 7294), (3647, 5960), (4168, 5215), (4172, 5210)]