20165540

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{12763}}^1$

素因数の和:12851

約数の個数: 24

約数和(自身を含む): 42887040

約数和(自身を除く): 22721500

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 12763, 25526, 51052, 63815, 127630, 255260, 1008277, 2016554, 4033108, 5041385, 10082770, 20165540]

約数ペア:

[(1, 20165540), (2, 10082770), (4, 5041385), (5, 4033108), (10, 2016554), (20, 1008277), (79, 255260), (158, 127630), (316, 63815), (395, 51052), (790, 25526), (1580, 12763)]