18501820

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{181}}^1\times {\mathrm{269}}^1$

素因数の和:478

約数の個数: 48

約数和(自身を含む): 41277600

約数和(自身を除く): 22775780

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 181, 190, 269, 362, 380, 538, 724, 905, 1076, 1345, 1810, 2690, 3439, 3620, 5111, 5380, 6878, 10222, 13756, 17195, 20444, 25555, 34390, 48689, 51110, 68780, 97378, 102220, 194756, 243445, 486890, 925091, 973780, 1850182, 3700364, 4625455, 9250910, 18501820]

約数ペア:

[(1, 18501820), (2, 9250910), (4, 4625455), (5, 3700364), (10, 1850182), (19, 973780), (20, 925091), (38, 486890), (76, 243445), (95, 194756), (181, 102220), (190, 97378), (269, 68780), (362, 51110), (380, 48689), (538, 34390), (724, 25555), (905, 20444), (1076, 17195), (1345, 13756), (1810, 10222), (2690, 6878), (3439, 5380), (3620, 5111)]