19972325

素因数分解:

$5^2\times {\mathrm{19}}^2\times {\mathrm{2213}}^1$

素因数の和:2261

約数の個数: 18

約数和(自身を含む): 26149554

約数和(自身を除く): 6177229

約数列:

[1, 5, 19, 25, 95, 361, 475, 1805, 2213, 9025, 11065, 42047, 55325, 210235, 798893, 1051175, 3994465, 19972325]

約数ペア:

[(1, 19972325), (5, 3994465), (19, 1051175), (25, 798893), (95, 210235), (361, 55325), (475, 42047), (1805, 11065), (2213, 9025)]