669968

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{3221}}^1$

素因数の和:3242

約数の個数: 20

約数和(自身を含む): 1398348

約数和(自身を除く): 728380

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 3221, 6442, 12884, 25768, 41873, 51536, 83746, 167492, 334984, 669968]

約数ペア:

[(1, 669968), (2, 334984), (4, 167492), (8, 83746), (13, 51536), (16, 41873), (26, 25768), (52, 12884), (104, 6442), (208, 3221)]