20651855

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{569}}^1$

素因数の和:659

約数の個数: 32

約数和(自身を含む): 30533760

約数和(自身を除く): 9881905

約数列:

[1, 5, 7, 17, 35, 61, 85, 119, 305, 427, 569, 595, 1037, 2135, 2845, 3983, 5185, 7259, 9673, 19915, 34709, 36295, 48365, 67711, 173545, 242963, 338555, 590053, 1214815, 2950265, 4130371, 20651855]

約数ペア:

[(1, 20651855), (5, 4130371), (7, 2950265), (17, 1214815), (35, 590053), (61, 338555), (85, 242963), (119, 173545), (305, 67711), (427, 48365), (569, 36295), (595, 34709), (1037, 19915), (2135, 9673), (2845, 7259), (3983, 5185)]