21116431

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{2909}}^1$

素因数の和:2994

約数の個数: 16

約数和(自身を含む): 25980480

約数和(自身を除く): 4864049

約数列:

[1, 7, 17, 61, 119, 427, 1037, 2909, 7259, 20363, 49453, 177449, 346171, 1242143, 3016633, 21116431]

約数ペア:

[(1, 21116431), (7, 3016633), (17, 1242143), (61, 346171), (119, 177449), (427, 49453), (1037, 20363), (2909, 7259)]