21499163

素因数分解:

$7^1\times {\mathrm{47}}^1\times {\mathrm{101}}^1\times {\mathrm{647}}^1$

素因数の和:802

約数の個数: 16

約数和(自身を含む): 25380864

約数和(自身を除く): 3881701

約数列:

[1, 7, 47, 101, 329, 647, 707, 4529, 4747, 30409, 33229, 65347, 212863, 457429, 3071309, 21499163]

約数ペア:

[(1, 21499163), (7, 3071309), (47, 457429), (101, 212863), (329, 65347), (647, 33229), (707, 30409), (4529, 4747)]