668875775

素因数分解:

$5^2\times {\mathrm{109}}^1\times {\mathrm{389}}^1\times {\mathrm{631}}^1$

素因数の和:1139

約数の個数: 24

約数和(自身を含む): 840496800

約数和(自身を除く): 171621025

約数列:

[1, 5, 25, 109, 389, 545, 631, 1945, 2725, 3155, 9725, 15775, 42401, 68779, 212005, 245459, 343895, 1060025, 1227295, 1719475, 6136475, 26755031, 133775155, 668875775]

約数ペア:

[(1, 668875775), (5, 133775155), (25, 26755031), (109, 6136475), (389, 1719475), (545, 1227295), (631, 1060025), (1945, 343895), (2725, 245459), (3155, 212005), (9725, 68779), (15775, 42401)]