639928

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{1951}}^1$

素因数の和:1998

約数の個数: 16

約数和(自身を含む): 1229760

約数和(自身を除く): 589832

約数列:

[1, 2, 4, 8, 41, 82, 164, 328, 1951, 3902, 7804, 15608, 79991, 159982, 319964, 639928]

約数ペア:

[(1, 639928), (2, 319964), (4, 159982), (8, 79991), (41, 15608), (82, 7804), (164, 3902), (328, 1951)]