18918040

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4339}}^1$

素因数の和:4459

約数の個数: 32

約数和(自身を含む): 42966000

約数和(自身を除く): 24047960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4339, 4360, 8678, 17356, 21695, 34712, 43390, 86780, 173560, 472951, 945902, 1891804, 2364755, 3783608, 4729510, 9459020, 18918040]

約数ペア:

[(1, 18918040), (2, 9459020), (4, 4729510), (5, 3783608), (8, 2364755), (10, 1891804), (20, 945902), (40, 472951), (109, 173560), (218, 86780), (436, 43390), (545, 34712), (872, 21695), (1090, 17356), (2180, 8678), (4339, 4360)]