21904855

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{27211}}^1$

素因数の和:27246

約数の個数: 16

約数和(自身を含む): 31348224

約数和(自身を除く): 9443369

約数列:

[1, 5, 7, 23, 35, 115, 161, 805, 27211, 136055, 190477, 625853, 952385, 3129265, 4380971, 21904855]

約数ペア:

[(1, 21904855), (5, 4380971), (7, 3129265), (23, 952385), (35, 625853), (115, 190477), (161, 136055), (805, 27211)]