21265360

素因数分解:

$2^4\times 5^1\times {\mathrm{227}}^1\times {\mathrm{1171}}^1$

素因数の和:1411

約数の個数: 40

約数和(自身を含む): 49702176

約数和(自身を除く): 28436816

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 227, 454, 908, 1135, 1171, 1816, 2270, 2342, 3632, 4540, 4684, 5855, 9080, 9368, 11710, 18160, 18736, 23420, 46840, 93680, 265817, 531634, 1063268, 1329085, 2126536, 2658170, 4253072, 5316340, 10632680, 21265360]

約数ペア:

[(1, 21265360), (2, 10632680), (4, 5316340), (5, 4253072), (8, 2658170), (10, 2126536), (16, 1329085), (20, 1063268), (40, 531634), (80, 265817), (227, 93680), (454, 46840), (908, 23420), (1135, 18736), (1171, 18160), (1816, 11710), (2270, 9368), (2342, 9080), (3632, 5855), (4540, 4684)]