21288085

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{59}}^1\times {\mathrm{61}}^1$

素因数の和:158

約数の個数: 48

約数和(自身を含む): 32676480

約数和(自身を除く): 11388395

約数列:

[1, 5, 7, 13, 35, 59, 61, 65, 91, 169, 295, 305, 413, 427, 455, 767, 793, 845, 1183, 2065, 2135, 3599, 3835, 3965, 5369, 5551, 5915, 9971, 10309, 17995, 25193, 26845, 27755, 46787, 49855, 51545, 69797, 72163, 125965, 233935, 327509, 348985, 360815, 608231, 1637545, 3041155, 4257617, 21288085]

約数ペア:

[(1, 21288085), (5, 4257617), (7, 3041155), (13, 1637545), (35, 608231), (59, 360815), (61, 348985), (65, 327509), (91, 233935), (169, 125965), (295, 72163), (305, 69797), (413, 51545), (427, 49855), (455, 46787), (767, 27755), (793, 26845), (845, 25193), (1183, 17995), (2065, 10309), (2135, 9971), (3599, 5915), (3835, 5551), (3965, 5369)]