20389905

素因数分解:

$3^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{3041}}^1$

素因数の和:3201

約数の個数: 24

約数和(自身を含む): 35591400

約数和(自身を除く): 15201495

約数列:

[1, 3, 5, 9, 15, 45, 149, 447, 745, 1341, 2235, 3041, 6705, 9123, 15205, 27369, 45615, 136845, 453109, 1359327, 2265545, 4077981, 6796635, 20389905]

約数ペア:

[(1, 20389905), (3, 6796635), (5, 4077981), (9, 2265545), (15, 1359327), (45, 453109), (149, 136845), (447, 45615), (745, 27369), (1341, 15205), (2235, 9123), (3041, 6705)]