19957505

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{421}}^1\times {\mathrm{499}}^1$

素因数の和:944

約数の個数: 16

約数和(自身を含む): 25320000

約数和(自身を除く): 5362495

約数列:

[1, 5, 19, 95, 421, 499, 2105, 2495, 7999, 9481, 39995, 47405, 210079, 1050395, 3991501, 19957505]

約数ペア:

[(1, 19957505), (5, 3991501), (19, 1050395), (95, 210079), (421, 47405), (499, 39995), (2105, 9481), (2495, 7999)]