21089680

素因数分解:

$2^4\times 5^1\times {\mathrm{263621}}^1$

素因数の和:263634

約数の個数: 20

約数和(自身を含む): 49033692

約数和(自身を除く): 27944012

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263621, 527242, 1054484, 1318105, 2108968, 2636210, 4217936, 5272420, 10544840, 21089680]

約数ペア:

[(1, 21089680), (2, 10544840), (4, 5272420), (5, 4217936), (8, 2636210), (10, 2108968), (16, 1318105), (20, 1054484), (40, 527242), (80, 263621)]