18902401

素因数分解:

$7^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{521}}^1$

素因数の和:672

約数の個数: 16

約数和(自身を含む): 22249728

約数和(自身を除く): 3347327

約数列:

[1, 7, 71, 73, 497, 511, 521, 3647, 5183, 36281, 36991, 38033, 258937, 266231, 2700343, 18902401]

約数ペア:

[(1, 18902401), (7, 2700343), (71, 266231), (73, 258937), (497, 38033), (511, 36991), (521, 36281), (3647, 5183)]