21809680

素因数分解:

$2^4\times 5^1\times {\mathrm{272621}}^1$

素因数の和:272634

約数の個数: 20

約数和(自身を含む): 50707692

約数和(自身を除く): 28898012

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 272621, 545242, 1090484, 1363105, 2180968, 2726210, 4361936, 5452420, 10904840, 21809680]

約数ペア:

[(1, 21809680), (2, 10904840), (4, 5452420), (5, 4361936), (8, 2726210), (10, 2180968), (16, 1363105), (20, 1090484), (40, 545242), (80, 272621)]