197202020

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{161641}}^1$

素因数の和:161711

約数の個数: 24

約数和(自身を含む): 420915768

約数和(自身を除く): 223713748

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 161641, 323282, 646564, 808205, 1616410, 3232820, 9860101, 19720202, 39440404, 49300505, 98601010, 197202020]

約数ペア:

[(1, 197202020), (2, 98601010), (4, 49300505), (5, 39440404), (10, 19720202), (20, 9860101), (61, 3232820), (122, 1616410), (244, 808205), (305, 646564), (610, 323282), (1220, 161641)]