20998970

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{51217}}^1$

素因数の和:51265

約数の個数: 16

約数和(自身を含む): 38720808

約数和(自身を除く): 17721838

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 51217, 102434, 256085, 512170, 2099897, 4199794, 10499485, 20998970]

約数ペア:

[(1, 20998970), (2, 10499485), (5, 4199794), (10, 2099897), (41, 512170), (82, 256085), (205, 102434), (410, 51217)]