18570920

素因数分解:

$2^3\times 5^1\times {\mathrm{107}}^1\times {\mathrm{4339}}^1$

素因数の和:4457

約数の個数: 32

約数和(自身を含む): 42184800

約数和(自身を除く): 23613880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 107, 214, 428, 535, 856, 1070, 2140, 4280, 4339, 8678, 17356, 21695, 34712, 43390, 86780, 173560, 464273, 928546, 1857092, 2321365, 3714184, 4642730, 9285460, 18570920]

約数ペア:

[(1, 18570920), (2, 9285460), (4, 4642730), (5, 3714184), (8, 2321365), (10, 1857092), (20, 928546), (40, 464273), (107, 173560), (214, 86780), (428, 43390), (535, 34712), (856, 21695), (1070, 17356), (2140, 8678), (4280, 4339)]