20408875

素因数分解:

$5^3\times {\mathrm{43}}^1\times {\mathrm{3797}}^1$

素因数の和:3855

約数の個数: 16

約数和(自身を含む): 26069472

約数和(自身を除く): 5660597

約数列:

[1, 5, 25, 43, 125, 215, 1075, 3797, 5375, 18985, 94925, 163271, 474625, 816355, 4081775, 20408875]

約数ペア:

[(1, 20408875), (5, 4081775), (25, 816355), (43, 474625), (125, 163271), (215, 94925), (1075, 18985), (3797, 5375)]