20259980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{2687}}^1$

素因数の和:2738

約数の個数: 48

約数和(自身を含む): 47416320

約数和(自身を除く): 27156340

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 29, 52, 58, 65, 116, 130, 145, 260, 290, 377, 580, 754, 1508, 1885, 2687, 3770, 5374, 7540, 10748, 13435, 26870, 34931, 53740, 69862, 77923, 139724, 155846, 174655, 311692, 349310, 389615, 698620, 779230, 1012999, 1558460, 2025998, 4051996, 5064995, 10129990, 20259980]

約数ペア:

[(1, 20259980), (2, 10129990), (4, 5064995), (5, 4051996), (10, 2025998), (13, 1558460), (20, 1012999), (26, 779230), (29, 698620), (52, 389615), (58, 349310), (65, 311692), (116, 174655), (130, 155846), (145, 139724), (260, 77923), (290, 69862), (377, 53740), (580, 34931), (754, 26870), (1508, 13435), (1885, 10748), (2687, 7540), (3770, 5374)]