21000460

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^2\times {\mathrm{59}}^1$

素因数の和:155

約数の個数: 72

約数和(自身を含む): 49638960

約数和(自身を除く): 28638500

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 37, 52, 59, 65, 74, 118, 130, 148, 185, 236, 260, 295, 370, 481, 590, 740, 767, 962, 1180, 1369, 1534, 1924, 2183, 2405, 2738, 3068, 3835, 4366, 4810, 5476, 6845, 7670, 8732, 9620, 10915, 13690, 15340, 17797, 21830, 27380, 28379, 35594, 43660, 56758, 71188, 80771, 88985, 113516, 141895, 161542, 177970, 283790, 323084, 355940, 403855, 567580, 807710, 1050023, 1615420, 2100046, 4200092, 5250115, 10500230, 21000460]

約数ペア:

[(1, 21000460), (2, 10500230), (4, 5250115), (5, 4200092), (10, 2100046), (13, 1615420), (20, 1050023), (26, 807710), (37, 567580), (52, 403855), (59, 355940), (65, 323084), (74, 283790), (118, 177970), (130, 161542), (148, 141895), (185, 113516), (236, 88985), (260, 80771), (295, 71188), (370, 56758), (481, 43660), (590, 35594), (740, 28379), (767, 27380), (962, 21830), (1180, 17797), (1369, 15340), (1534, 13690), (1924, 10915), (2183, 9620), (2405, 8732), (2738, 7670), (3068, 6845), (3835, 5476), (4366, 4810)]