18104920

素因数分解:

$2^3\times 5^1\times {\mathrm{263}}^1\times {\mathrm{1721}}^1$

素因数の和:1995

約数の個数: 32

約数和(自身を含む): 40914720

約数和(自身を除く): 22809800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 263, 526, 1052, 1315, 1721, 2104, 2630, 3442, 5260, 6884, 8605, 10520, 13768, 17210, 34420, 68840, 452623, 905246, 1810492, 2263115, 3620984, 4526230, 9052460, 18104920]

約数ペア:

[(1, 18104920), (2, 9052460), (4, 4526230), (5, 3620984), (8, 2263115), (10, 1810492), (20, 905246), (40, 452623), (263, 68840), (526, 34420), (1052, 17210), (1315, 13768), (1721, 10520), (2104, 8605), (2630, 6884), (3442, 5260)]