18680455

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{101}}^1\times {\mathrm{521}}^1$

素因数の和:698

約数の個数: 16

約数和(自身を含む): 23001408

約数和(自身を除く): 4320953

約数列:

[1, 5, 71, 101, 355, 505, 521, 2605, 7171, 35855, 36991, 52621, 184955, 263105, 3736091, 18680455]

約数ペア:

[(1, 18680455), (5, 3736091), (71, 263105), (101, 184955), (355, 52621), (505, 36991), (521, 35855), (2605, 7171)]