20978690

素因数分解:

$2^1\times 5^1\times {\mathrm{229}}^1\times {\mathrm{9161}}^1$

素因数の和:9397

約数の個数: 16

約数和(自身を含む): 37930680

約数和(自身を除く): 16951990

約数列:

[1, 2, 5, 10, 229, 458, 1145, 2290, 9161, 18322, 45805, 91610, 2097869, 4195738, 10489345, 20978690]

約数ペア:

[(1, 20978690), (2, 10489345), (5, 4195738), (10, 2097869), (229, 91610), (458, 45805), (1145, 18322), (2290, 9161)]