20643980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{147457}}^1$

素因数の和:147473

約数の個数: 24

約数和(自身を含む): 49545888

約数和(自身を除く): 28901908

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 147457, 294914, 589828, 737285, 1032199, 1474570, 2064398, 2949140, 4128796, 5160995, 10321990, 20643980]

約数ペア:

[(1, 20643980), (2, 10321990), (4, 5160995), (5, 4128796), (7, 2949140), (10, 2064398), (14, 1474570), (20, 1032199), (28, 737285), (35, 589828), (70, 294914), (140, 147457)]