21171891

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{23603}}^1$

素因数の和:23642

約数の個数: 16

約数和(自身を含む): 31723776

約数和(自身を除く): 10551885

約数列:

[1, 3, 13, 23, 39, 69, 299, 897, 23603, 70809, 306839, 542869, 920517, 1628607, 7057297, 21171891]

約数ペア:

[(1, 21171891), (3, 7057297), (13, 1628607), (23, 920517), (39, 542869), (69, 306839), (299, 70809), (897, 23603)]