20465120

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9839}}^1$

素因数の和:9867

約数の個数: 48

約数和(自身を含む): 52073280

約数和(自身を除く): 31608160

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 9839, 19678, 39356, 49195, 78712, 98390, 127907, 157424, 196780, 255814, 314848, 393560, 511628, 639535, 787120, 1023256, 1279070, 1574240, 2046512, 2558140, 4093024, 5116280, 10232560, 20465120]

約数ペア:

[(1, 20465120), (2, 10232560), (4, 5116280), (5, 4093024), (8, 2558140), (10, 2046512), (13, 1574240), (16, 1279070), (20, 1023256), (26, 787120), (32, 639535), (40, 511628), (52, 393560), (65, 314848), (80, 255814), (104, 196780), (130, 157424), (160, 127907), (208, 98390), (260, 78712), (416, 49195), (520, 39356), (1040, 19678), (2080, 9839)]