21990683

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{2521}}^1$

素因数の和:2606

約数の個数: 16

約数和(自身を含む): 26269152

約数和(自身を除く): 4278469

約数列:

[1, 11, 13, 61, 143, 671, 793, 2521, 8723, 27731, 32773, 153781, 360503, 1691591, 1999153, 21990683]

約数ペア:

[(1, 21990683), (11, 1999153), (13, 1691591), (61, 360503), (143, 153781), (671, 32773), (793, 27731), (2521, 8723)]