21000415185

素因数分解:

$3^4\times 5^1\times {\mathrm{51852877}}^1$

素因数の和:51852894

約数の個数: 20

約数和(自身を含む): 37645189428

約数和(自身を除く): 16644774243

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 51852877, 155558631, 259264385, 466675893, 777793155, 1400027679, 2333379465, 4200083037, 7000138395, 21000415185]

約数ペア:

[(1, 21000415185), (3, 7000138395), (5, 4200083037), (9, 2333379465), (15, 1400027679), (27, 777793155), (45, 466675893), (81, 259264385), (135, 155558631), (405, 51852877)]