640815

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{359}}^1$

素因数の和:391

約数の個数: 32

約数和(自身を含む): 1244160

約数和(自身を除く): 603345

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 105, 119, 255, 357, 359, 595, 1077, 1785, 1795, 2513, 5385, 6103, 7539, 12565, 18309, 30515, 37695, 42721, 91545, 128163, 213605, 640815]

約数ペア:

[(1, 640815), (3, 213605), (5, 128163), (7, 91545), (15, 42721), (17, 37695), (21, 30515), (35, 18309), (51, 12565), (85, 7539), (105, 6103), (119, 5385), (255, 2513), (357, 1795), (359, 1785), (595, 1077)]