20400375

素因数分解:

$3^1\times 5^3\times {\mathrm{54401}}^1$

素因数の和:54419

約数の個数: 16

約数和(自身を含む): 33946848

約数和(自身を除く): 13546473

約数列:

[1, 3, 5, 15, 25, 75, 125, 375, 54401, 163203, 272005, 816015, 1360025, 4080075, 6800125, 20400375]

約数ペア:

[(1, 20400375), (3, 6800125), (5, 4080075), (15, 1360025), (25, 816015), (75, 272005), (125, 163203), (375, 54401)]