21904809

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{523}}^1\times {\mathrm{607}}^1$

素因数の和:1156

約数の個数: 16

約数和(自身を含む): 30584832

約数和(自身を除く): 8680023

約数列:

[1, 3, 23, 69, 523, 607, 1569, 1821, 12029, 13961, 36087, 41883, 317461, 952383, 7301603, 21904809]

約数ペア:

[(1, 21904809), (3, 7301603), (23, 952383), (69, 317461), (523, 41883), (607, 36087), (1569, 13961), (1821, 12029)]