18975440

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{21563}}^1$

素因数の和:21587

約数の個数: 40

約数和(自身を含む): 48130848

約数和(自身を除く): 29155408

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 21563, 43126, 86252, 107815, 172504, 215630, 237193, 345008, 431260, 474386, 862520, 948772, 1185965, 1725040, 1897544, 2371930, 3795088, 4743860, 9487720, 18975440]

約数ペア:

[(1, 18975440), (2, 9487720), (4, 4743860), (5, 3795088), (8, 2371930), (10, 1897544), (11, 1725040), (16, 1185965), (20, 948772), (22, 862520), (40, 474386), (44, 431260), (55, 345008), (80, 237193), (88, 215630), (110, 172504), (176, 107815), (220, 86252), (440, 43126), (880, 21563)]