400007240

素因数分解:

$2^3\times 5^1\times {\mathrm{991}}^1\times {\mathrm{10091}}^1$

素因数の和:11093

約数の個数: 32

約数和(自身を含む): 901013760

約数和(自身を除く): 501006520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 991, 1982, 3964, 4955, 7928, 9910, 10091, 19820, 20182, 39640, 40364, 50455, 80728, 100910, 201820, 403640, 10000181, 20000362, 40000724, 50000905, 80001448, 100001810, 200003620, 400007240]

約数ペア:

[(1, 400007240), (2, 200003620), (4, 100001810), (5, 80001448), (8, 50000905), (10, 40000724), (20, 20000362), (40, 10000181), (991, 403640), (1982, 201820), (3964, 100910), (4955, 80728), (7928, 50455), (9910, 40364), (10091, 39640), (19820, 20182)]