17998820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{128563}}^1$

素因数の和:128579

約数の個数: 24

約数和(自身を含む): 43197504

約数和(自身を除く): 25198684

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 128563, 257126, 514252, 642815, 899941, 1285630, 1799882, 2571260, 3599764, 4499705, 8999410, 17998820]

約数ペア:

[(1, 17998820), (2, 8999410), (4, 4499705), (5, 3599764), (7, 2571260), (10, 1799882), (14, 1285630), (20, 899941), (28, 642815), (35, 514252), (70, 257126), (140, 128563)]