21285874160

素因数分解:

$2^4\times 5^1\times {\mathrm{266073427}}^1$

素因数の和:266073440

約数の個数: 20

約数和(自身を含む): 49489657608

約数和(自身を除く): 28203783448

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 266073427, 532146854, 1064293708, 1330367135, 2128587416, 2660734270, 4257174832, 5321468540, 10642937080, 21285874160]

約数ペア:

[(1, 21285874160), (2, 10642937080), (4, 5321468540), (5, 4257174832), (8, 2660734270), (10, 2128587416), (16, 1330367135), (20, 1064293708), (40, 532146854), (80, 266073427)]