639765

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{677}}^1$

素因数の和:698

約数の個数: 32

約数和(自身を含む): 1301760

約数和(自身を除く): 661995

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 135, 189, 315, 677, 945, 2031, 3385, 4739, 6093, 10155, 14217, 18279, 23695, 30465, 42651, 71085, 91395, 127953, 213255, 639765]

約数ペア:

[(1, 639765), (3, 213255), (5, 127953), (7, 91395), (9, 71085), (15, 42651), (21, 30465), (27, 23695), (35, 18279), (45, 14217), (63, 10155), (105, 6093), (135, 4739), (189, 3385), (315, 2031), (677, 945)]