21085640

素因数分解:

$2^3\times 5^1\times {\mathrm{151}}^1\times {\mathrm{3491}}^1$

素因数の和:3653

約数の個数: 32

約数和(自身を含む): 47770560

約数和(自身を除く): 26684920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 151, 302, 604, 755, 1208, 1510, 3020, 3491, 6040, 6982, 13964, 17455, 27928, 34910, 69820, 139640, 527141, 1054282, 2108564, 2635705, 4217128, 5271410, 10542820, 21085640]

約数ペア:

[(1, 21085640), (2, 10542820), (4, 5271410), (5, 4217128), (8, 2635705), (10, 2108564), (20, 1054282), (40, 527141), (151, 139640), (302, 69820), (604, 34910), (755, 27928), (1208, 17455), (1510, 13964), (3020, 6982), (3491, 6040)]