20922980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80473}}^1$

素因数の和:80495

約数の個数: 24

約数和(自身を含む): 47318712

約数和(自身を除く): 26395732

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80473, 160946, 321892, 402365, 804730, 1046149, 1609460, 2092298, 4184596, 5230745, 10461490, 20922980]

約数ペア:

[(1, 20922980), (2, 10461490), (4, 5230745), (5, 4184596), (10, 2092298), (13, 1609460), (20, 1046149), (26, 804730), (52, 402365), (65, 321892), (130, 160946), (260, 80473)]