21009680

素因数分解:

$2^4\times 5^1\times {\mathrm{262621}}^1$

素因数の和:262634

約数の個数: 20

約数和(自身を含む): 48847692

約数和(自身を除く): 27838012

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 262621, 525242, 1050484, 1313105, 2100968, 2626210, 4201936, 5252420, 10504840, 21009680]

約数ペア:

[(1, 21009680), (2, 10504840), (4, 5252420), (5, 4201936), (8, 2626210), (10, 2100968), (16, 1313105), (20, 1050484), (40, 525242), (80, 262621)]