20355975

素因数分解:

$3^3\times 5^2\times {\mathrm{53}}^1\times {\mathrm{569}}^1$

素因数の和:641

約数の個数: 48

約数和(自身を含む): 38167200

約数和(自身を除く): 17811225

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 53, 75, 135, 159, 225, 265, 477, 569, 675, 795, 1325, 1431, 1707, 2385, 2845, 3975, 5121, 7155, 8535, 11925, 14225, 15363, 25605, 30157, 35775, 42675, 76815, 90471, 128025, 150785, 271413, 384075, 452355, 753925, 814239, 1357065, 2261775, 4071195, 6785325, 20355975]

約数ペア:

[(1, 20355975), (3, 6785325), (5, 4071195), (9, 2261775), (15, 1357065), (25, 814239), (27, 753925), (45, 452355), (53, 384075), (75, 271413), (135, 150785), (159, 128025), (225, 90471), (265, 76815), (477, 42675), (569, 35775), (675, 30157), (795, 25605), (1325, 15363), (1431, 14225), (1707, 11925), (2385, 8535), (2845, 7155), (3975, 5121)]