20022980

素因数分解:

$2^2\times 5^1\times {\mathrm{491}}^1\times {\mathrm{2039}}^1$

素因数の和:2539

約数の個数: 24

約数和(自身を含む): 42154560

約数和(自身を除く): 22131580

約数列:

[1, 2, 4, 5, 10, 20, 491, 982, 1964, 2039, 2455, 4078, 4910, 8156, 9820, 10195, 20390, 40780, 1001149, 2002298, 4004596, 5005745, 10011490, 20022980]

約数ペア:

[(1, 20022980), (2, 10011490), (4, 5005745), (5, 4004596), (10, 2002298), (20, 1001149), (491, 40780), (982, 20390), (1964, 10195), (2039, 9820), (2455, 8156), (4078, 4910)]