644816

素因数分解:

$2^4\times {\mathrm{191}}^1\times {\mathrm{211}}^1$

素因数の和:410

約数の個数: 20

約数和(自身を含む): 1261824

約数和(自身を除く): 617008

約数列:

[1, 2, 4, 8, 16, 191, 211, 382, 422, 764, 844, 1528, 1688, 3056, 3376, 40301, 80602, 161204, 322408, 644816]

約数ペア:

[(1, 644816), (2, 322408), (4, 161204), (8, 80602), (16, 40301), (191, 3376), (211, 3056), (382, 1688), (422, 1528), (764, 844)]