21053875

素因数分解:

$5^3\times {\mathrm{43}}^1\times {\mathrm{3917}}^1$

素因数の和:3975

約数の個数: 16

約数和(自身を含む): 26893152

約数和(自身を除く): 5839277

約数列:

[1, 5, 25, 43, 125, 215, 1075, 3917, 5375, 19585, 97925, 168431, 489625, 842155, 4210775, 21053875]

約数ペア:

[(1, 21053875), (5, 4210775), (25, 842155), (43, 489625), (125, 168431), (215, 97925), (1075, 19585), (3917, 5375)]