20406785

素因数分解:

$5^1\times 7^3\times {\mathrm{73}}^1\times {\mathrm{163}}^1$

素因数の和:262

約数の個数: 32

約数和(自身を含む): 29126400

約数和(自身を除く): 8719615

約数列:

[1, 5, 7, 35, 49, 73, 163, 245, 343, 365, 511, 815, 1141, 1715, 2555, 3577, 5705, 7987, 11899, 17885, 25039, 39935, 55909, 59495, 83293, 125195, 279545, 416465, 583051, 2915255, 4081357, 20406785]

約数ペア:

[(1, 20406785), (5, 4081357), (7, 2915255), (35, 583051), (49, 416465), (73, 279545), (163, 125195), (245, 83293), (343, 59495), (365, 55909), (511, 39935), (815, 25039), (1141, 17885), (1715, 11899), (2555, 7987), (3577, 5705)]