19490920

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6863}}^1$

素因数の和:6945

約数の個数: 32

約数和(自身を含む): 44478720

約数和(自身を除く): 24987800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 6863, 13726, 27452, 34315, 54904, 68630, 137260, 274520, 487273, 974546, 1949092, 2436365, 3898184, 4872730, 9745460, 19490920]

約数ペア:

[(1, 19490920), (2, 9745460), (4, 4872730), (5, 3898184), (8, 2436365), (10, 1949092), (20, 974546), (40, 487273), (71, 274520), (142, 137260), (284, 68630), (355, 54904), (568, 34315), (710, 27452), (1420, 13726), (2840, 6863)]