2018721025

素因数分解:

$5^2\times {\mathrm{19}}^2\times {\mathrm{223681}}^1$

素因数の和:223729

約数の個数: 18

約数和(自身を含む): 2641908102

約数和(自身を除く): 623187077

約数列:

[1, 5, 19, 25, 95, 361, 475, 1805, 9025, 223681, 1118405, 4249939, 5592025, 21249695, 80748841, 106248475, 403744205, 2018721025]

約数ペア:

[(1, 2018721025), (5, 403744205), (19, 106248475), (25, 80748841), (95, 21249695), (361, 5592025), (475, 4249939), (1805, 1118405), (9025, 223681)]