20931080

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{30781}}^1$

素因数の和:30809

約数の個数: 32

約数和(自身を含む): 49866840

約数和(自身を除く): 28935760

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 30781, 61562, 123124, 153905, 246248, 307810, 523277, 615620, 1046554, 1231240, 2093108, 2616385, 4186216, 5232770, 10465540, 20931080]

約数ペア:

[(1, 20931080), (2, 10465540), (4, 5232770), (5, 4186216), (8, 2616385), (10, 2093108), (17, 1231240), (20, 1046554), (34, 615620), (40, 523277), (68, 307810), (85, 246248), (136, 153905), (170, 123124), (340, 61562), (680, 30781)]