641072

素因数分解:

$2^4\times {\mathrm{103}}^1\times {\mathrm{389}}^1$

素因数の和:500

約数の個数: 20

約数和(自身を含む): 1257360

約数和(自身を除く): 616288

約数列:

[1, 2, 4, 8, 16, 103, 206, 389, 412, 778, 824, 1556, 1648, 3112, 6224, 40067, 80134, 160268, 320536, 641072]

約数ペア:

[(1, 641072), (2, 320536), (4, 160268), (8, 80134), (16, 40067), (103, 6224), (206, 3112), (389, 1648), (412, 1556), (778, 824)]