16720015

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{47}}^1\times {\mathrm{421}}^1$

素因数の和:499

約数の個数: 24

約数和(自身を含む): 22241088

約数和(自身を除く): 5521073

約数列:

[1, 5, 13, 47, 65, 169, 235, 421, 611, 845, 2105, 3055, 5473, 7943, 19787, 27365, 39715, 71149, 98935, 257231, 355745, 1286155, 3344003, 16720015]

約数ペア:

[(1, 16720015), (5, 3344003), (13, 1286155), (47, 355745), (65, 257231), (169, 98935), (235, 71149), (421, 39715), (611, 27365), (845, 19787), (2105, 7943), (3055, 5473)]