20949975

素因数分解:

$3^3\times 5^2\times {\mathrm{41}}^1\times {\mathrm{757}}^1$

素因数の和:817

約数の個数: 48

約数和(自身を含む): 39476640

約数和(自身を除く): 18526665

約数列:

[1, 3, 5, 9, 15, 25, 27, 41, 45, 75, 123, 135, 205, 225, 369, 615, 675, 757, 1025, 1107, 1845, 2271, 3075, 3785, 5535, 6813, 9225, 11355, 18925, 20439, 27675, 31037, 34065, 56775, 93111, 102195, 155185, 170325, 279333, 465555, 510975, 775925, 837999, 1396665, 2327775, 4189995, 6983325, 20949975]

約数ペア:

[(1, 20949975), (3, 6983325), (5, 4189995), (9, 2327775), (15, 1396665), (25, 837999), (27, 775925), (41, 510975), (45, 465555), (75, 279333), (123, 170325), (135, 155185), (205, 102195), (225, 93111), (369, 56775), (615, 34065), (675, 31037), (757, 27675), (1025, 20439), (1107, 18925), (1845, 11355), (2271, 9225), (3075, 6813), (3785, 5535)]