21080984

素因数分解:

$2^3\times {\mathrm{127}}^1\times {\mathrm{20749}}^1$

素因数の和:20882

約数の個数: 16

約数和(自身を含む): 39840000

約数和(自身を除く): 18759016

約数列:

[1, 2, 4, 8, 127, 254, 508, 1016, 20749, 41498, 82996, 165992, 2635123, 5270246, 10540492, 21080984]

約数ペア:

[(1, 21080984), (2, 10540492), (4, 5270246), (8, 2635123), (127, 165992), (254, 82996), (508, 41498), (1016, 20749)]