21243615

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{569}}^1$

素因数の和:727

約数の個数: 32

約数和(自身を含む): 36115200

約数和(自身を除く): 14871585

約数列:

[1, 3, 5, 15, 19, 57, 95, 131, 285, 393, 569, 655, 1707, 1965, 2489, 2845, 7467, 8535, 10811, 12445, 32433, 37335, 54055, 74539, 162165, 223617, 372695, 1118085, 1416241, 4248723, 7081205, 21243615]

約数ペア:

[(1, 21243615), (3, 7081205), (5, 4248723), (15, 1416241), (19, 1118085), (57, 372695), (95, 223617), (131, 162165), (285, 74539), (393, 54055), (569, 37335), (655, 32433), (1707, 12445), (1965, 10811), (2489, 8535), (2845, 7467)]