21691780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{2293}}^1$

素因数の和:2356

約数の個数: 48

約数和(自身を含む): 50871744

約数和(自身を除く): 29179964

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 43, 44, 55, 86, 110, 172, 215, 220, 430, 473, 860, 946, 1892, 2293, 2365, 4586, 4730, 9172, 9460, 11465, 22930, 25223, 45860, 50446, 98599, 100892, 126115, 197198, 252230, 394396, 492995, 504460, 985990, 1084589, 1971980, 2169178, 4338356, 5422945, 10845890, 21691780]

約数ペア:

[(1, 21691780), (2, 10845890), (4, 5422945), (5, 4338356), (10, 2169178), (11, 1971980), (20, 1084589), (22, 985990), (43, 504460), (44, 492995), (55, 394396), (86, 252230), (110, 197198), (172, 126115), (215, 100892), (220, 98599), (430, 50446), (473, 45860), (860, 25223), (946, 22930), (1892, 11465), (2293, 9460), (2365, 9172), (4586, 4730)]