20618475

素因数分解:

$3^1\times 5^2\times {\mathrm{421}}^1\times {\mathrm{653}}^1$

素因数の和:1087

約数の個数: 24

約数和(自身を含む): 34222512

約数和(自身を除く): 13604037

約数列:

[1, 3, 5, 15, 25, 75, 421, 653, 1263, 1959, 2105, 3265, 6315, 9795, 10525, 16325, 31575, 48975, 274913, 824739, 1374565, 4123695, 6872825, 20618475]

約数ペア:

[(1, 20618475), (3, 6872825), (5, 4123695), (15, 1374565), (25, 824739), (75, 274913), (421, 48975), (653, 31575), (1263, 16325), (1959, 10525), (2105, 9795), (3265, 6315)]