17978380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{281}}^1\times {\mathrm{457}}^1$

素因数の和:754

約数の個数: 48

約数和(自身を含む): 43396416

約数和(自身を除く): 25418036

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 281, 457, 562, 914, 1124, 1405, 1828, 1967, 2285, 2810, 3199, 3934, 4570, 5620, 6398, 7868, 9140, 9835, 12796, 15995, 19670, 31990, 39340, 63980, 128417, 256834, 513668, 642085, 898919, 1284170, 1797838, 2568340, 3595676, 4494595, 8989190, 17978380]

約数ペア:

[(1, 17978380), (2, 8989190), (4, 4494595), (5, 3595676), (7, 2568340), (10, 1797838), (14, 1284170), (20, 898919), (28, 642085), (35, 513668), (70, 256834), (140, 128417), (281, 63980), (457, 39340), (562, 31990), (914, 19670), (1124, 15995), (1405, 12796), (1828, 9835), (1967, 9140), (2285, 7868), (2810, 6398), (3199, 5620), (3934, 4570)]