21145827

素因数分解:

$3^1\times {\mathrm{83}}^1\times {\mathrm{163}}^1\times {\mathrm{521}}^1$

素因数の和:770

約数の個数: 16

約数和(自身を含む): 28764288

約数和(自身を除く): 7618461

約数列:

[1, 3, 83, 163, 249, 489, 521, 1563, 13529, 40587, 43243, 84923, 129729, 254769, 7048609, 21145827]

約数ペア:

[(1, 21145827), (3, 7048609), (83, 254769), (163, 129729), (249, 84923), (489, 43243), (521, 40587), (1563, 13529)]