20978386

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{73351}}^1$

素因数の和:73377

約数の個数: 16

約数和(自身を含む): 36969408

約数和(自身を除く): 15991022

約数列:

[1, 2, 11, 13, 22, 26, 143, 286, 73351, 146702, 806861, 953563, 1613722, 1907126, 10489193, 20978386]

約数ペア:

[(1, 20978386), (2, 10489193), (11, 1907126), (13, 1613722), (22, 953563), (26, 806861), (143, 146702), (286, 73351)]