20913685

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{107}}^1$

素因数の和:253

約数の個数: 32

約数和(自身を含む): 28449792

約数和(自身を除く): 7536107

約数列:

[1, 5, 13, 31, 65, 97, 107, 155, 403, 485, 535, 1261, 1391, 2015, 3007, 3317, 6305, 6955, 10379, 15035, 16585, 39091, 43121, 51895, 134927, 195455, 215605, 321749, 674635, 1608745, 4182737, 20913685]

約数ペア:

[(1, 20913685), (5, 4182737), (13, 1608745), (31, 674635), (65, 321749), (97, 215605), (107, 195455), (155, 134927), (403, 51895), (485, 43121), (535, 39091), (1261, 16585), (1391, 15035), (2015, 10379), (3007, 6955), (3317, 6305)]