21240664

素因数分解:

$2^3\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{983}}^1$

素因数の和:1099

約数の個数: 32

約数和(自身を含む): 41505120

約数和(自身を除く): 20264456

約数列:

[1, 2, 4, 8, 37, 73, 74, 146, 148, 292, 296, 584, 983, 1966, 2701, 3932, 5402, 7864, 10804, 21608, 36371, 71759, 72742, 143518, 145484, 287036, 290968, 574072, 2655083, 5310166, 10620332, 21240664]

約数ペア:

[(1, 21240664), (2, 10620332), (4, 5310166), (8, 2655083), (37, 574072), (73, 290968), (74, 287036), (146, 145484), (148, 143518), (292, 72742), (296, 71759), (584, 36371), (983, 21608), (1966, 10804), (2701, 7864), (3932, 5402)]