639375

素因数分解:

$3^1\times 5^4\times {\mathrm{11}}^1\times {\mathrm{31}}^1$

素因数の和:65

約数の個数: 40

約数和(自身を含む): 1199616

約数和(自身を除く): 560241

約数列:

[1, 3, 5, 11, 15, 25, 31, 33, 55, 75, 93, 125, 155, 165, 275, 341, 375, 465, 625, 775, 825, 1023, 1375, 1705, 1875, 2325, 3875, 4125, 5115, 6875, 8525, 11625, 19375, 20625, 25575, 42625, 58125, 127875, 213125, 639375]

約数ペア:

[(1, 639375), (3, 213125), (5, 127875), (11, 58125), (15, 42625), (25, 25575), (31, 20625), (33, 19375), (55, 11625), (75, 8525), (93, 6875), (125, 5115), (155, 4125), (165, 3875), (275, 2325), (341, 1875), (375, 1705), (465, 1375), (625, 1023), (775, 825)]