20412855

素因数分解:

$3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6389}}^1$

素因数の和:6471

約数の個数: 24

約数和(自身を含む): 35886240

約数和(自身を除く): 15473385

約数列:

[1, 3, 5, 9, 15, 45, 71, 213, 355, 639, 1065, 3195, 6389, 19167, 31945, 57501, 95835, 287505, 453619, 1360857, 2268095, 4082571, 6804285, 20412855]

約数ペア:

[(1, 20412855), (3, 6804285), (5, 4082571), (9, 2268095), (15, 1360857), (45, 453619), (71, 287505), (213, 95835), (355, 57501), (639, 31945), (1065, 19167), (3195, 6389)]