21249440

素因数分解:

$2^5\times 5^1\times {\mathrm{59}}^1\times {\mathrm{2251}}^1$

素因数の和:2325

約数の個数: 48

約数和(自身を含む): 51075360

約数和(自身を除く): 29825920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 59, 80, 118, 160, 236, 295, 472, 590, 944, 1180, 1888, 2251, 2360, 4502, 4720, 9004, 9440, 11255, 18008, 22510, 36016, 45020, 72032, 90040, 132809, 180080, 265618, 360160, 531236, 664045, 1062472, 1328090, 2124944, 2656180, 4249888, 5312360, 10624720, 21249440]

約数ペア:

[(1, 21249440), (2, 10624720), (4, 5312360), (5, 4249888), (8, 2656180), (10, 2124944), (16, 1328090), (20, 1062472), (32, 664045), (40, 531236), (59, 360160), (80, 265618), (118, 180080), (160, 132809), (236, 90040), (295, 72032), (472, 45020), (590, 36016), (944, 22510), (1180, 18008), (1888, 11255), (2251, 9440), (2360, 9004), (4502, 4720)]