19887505

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{229}}^1\times {\mathrm{1579}}^1$

素因数の和:1824

約数の個数: 16

約数和(自身を含む): 26164800

約数和(自身を除く): 6277295

約数列:

[1, 5, 11, 55, 229, 1145, 1579, 2519, 7895, 12595, 17369, 86845, 361591, 1807955, 3977501, 19887505]

約数ペア:

[(1, 19887505), (5, 3977501), (11, 1807955), (55, 361591), (229, 86845), (1145, 17369), (1579, 12595), (2519, 7895)]