21908159

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{12671}}^1$

素因数の和:12710

約数の個数: 16

約数和(自身を含む): 28385280

約数和(自身を除く): 6477121

約数列:

[1, 7, 13, 19, 91, 133, 247, 1729, 12671, 88697, 164723, 240749, 1153061, 1685243, 3129737, 21908159]

約数ペア:

[(1, 21908159), (7, 3129737), (13, 1685243), (19, 1153061), (91, 240749), (133, 164723), (247, 88697), (1729, 12671)]