20996890

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{20789}}^1$

素因数の和:20897

約数の個数: 16

約数和(自身を含む): 38170440

約数和(自身を除く): 17173550

約数列:

[1, 2, 5, 10, 101, 202, 505, 1010, 20789, 41578, 103945, 207890, 2099689, 4199378, 10498445, 20996890]

約数ペア:

[(1, 20996890), (2, 10498445), (5, 4199378), (10, 2099689), (101, 207890), (202, 103945), (505, 41578), (1010, 20789)]