642785

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1$

素因数の和:89

約数の個数: 32

約数和(自身を含む): 967680

約数和(自身を除く): 324895

約数列:

[1, 5, 11, 13, 29, 31, 55, 65, 143, 145, 155, 319, 341, 377, 403, 715, 899, 1595, 1705, 1885, 2015, 4147, 4433, 4495, 9889, 11687, 20735, 22165, 49445, 58435, 128557, 642785]

約数ペア:

[(1, 642785), (5, 128557), (11, 58435), (13, 49445), (29, 22165), (31, 20735), (55, 11687), (65, 9889), (143, 4495), (145, 4433), (155, 4147), (319, 2015), (341, 1885), (377, 1705), (403, 1595), (715, 899)]