20744575

素因数分解:

$5^2\times {\mathrm{61}}^2\times {\mathrm{223}}^1$

素因数の和:355

約数の個数: 18

約数和(自身を含む): 26269152

約数和(自身を除く): 5524577

約数列:

[1, 5, 25, 61, 223, 305, 1115, 1525, 3721, 5575, 13603, 18605, 68015, 93025, 340075, 829783, 4148915, 20744575]

約数ペア:

[(1, 20744575), (5, 4148915), (25, 829783), (61, 340075), (223, 93025), (305, 68015), (1115, 18605), (1525, 13603), (3721, 5575)]