21393278

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{193}}^1\times {\mathrm{2917}}^1$

素因数の和:3131

約数の個数: 16

約数和(自身を含む): 33965520

約数和(自身を除く): 12572242

約数列:

[1, 2, 19, 38, 193, 386, 2917, 3667, 5834, 7334, 55423, 110846, 562981, 1125962, 10696639, 21393278]

約数ペア:

[(1, 21393278), (2, 10696639), (19, 1125962), (38, 562981), (193, 110846), (386, 55423), (2917, 7334), (3667, 5834)]