21351891

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{10607}}^1$

素因数の和:10682

約数の個数: 16

約数和(自身を含む): 31569408

約数和(自身を除く): 10217517

約数列:

[1, 3, 11, 33, 61, 183, 671, 2013, 10607, 31821, 116677, 350031, 647027, 1941081, 7117297, 21351891]

約数ペア:

[(1, 21351891), (3, 7117297), (11, 1941081), (33, 647027), (61, 350031), (183, 116677), (671, 31821), (2013, 10607)]