21311620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{1327}}^1$

素因数の和:1420

約数の個数: 48

約数和(自身を含む): 49529088

約数和(自身を除く): 28217468

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 73, 110, 146, 220, 292, 365, 730, 803, 1327, 1460, 1606, 2654, 3212, 4015, 5308, 6635, 8030, 13270, 14597, 16060, 26540, 29194, 58388, 72985, 96871, 145970, 193742, 291940, 387484, 484355, 968710, 1065581, 1937420, 2131162, 4262324, 5327905, 10655810, 21311620]

約数ペア:

[(1, 21311620), (2, 10655810), (4, 5327905), (5, 4262324), (10, 2131162), (11, 1937420), (20, 1065581), (22, 968710), (44, 484355), (55, 387484), (73, 291940), (110, 193742), (146, 145970), (220, 96871), (292, 72985), (365, 58388), (730, 29194), (803, 26540), (1327, 16060), (1460, 14597), (1606, 13270), (2654, 8030), (3212, 6635), (4015, 5308)]