19721615

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{5659}}^1$

素因数の和:5722

約数の個数: 16

約数和(自身を含む): 25673760

約数和(自身を除く): 5952145

約数列:

[1, 5, 17, 41, 85, 205, 697, 3485, 5659, 28295, 96203, 232019, 481015, 1160095, 3944323, 19721615]

約数ペア:

[(1, 19721615), (5, 3944323), (17, 1160095), (41, 481015), (85, 232019), (205, 96203), (697, 28295), (3485, 5659)]