20724445

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{571}}^1$

素因数の和:661

約数の個数: 32

約数和(自身を含む): 30640896

約数和(自身を除く): 9916451

約数列:

[1, 5, 7, 17, 35, 61, 85, 119, 305, 427, 571, 595, 1037, 2135, 2855, 3997, 5185, 7259, 9707, 19985, 34831, 36295, 48535, 67949, 174155, 243817, 339745, 592127, 1219085, 2960635, 4144889, 20724445]

約数ペア:

[(1, 20724445), (5, 4144889), (7, 2960635), (17, 1219085), (35, 592127), (61, 339745), (85, 243817), (119, 174155), (305, 67949), (427, 48535), (571, 36295), (595, 34831), (1037, 19985), (2135, 9707), (2855, 7259), (3997, 5185)]