21906255

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{208631}}^1$

素因数の和:208646

約数の個数: 16

約数和(自身を含む): 40057344

約数和(自身を除く): 18151089

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 208631, 625893, 1043155, 1460417, 3129465, 4381251, 7302085, 21906255]

約数ペア:

[(1, 21906255), (3, 7302085), (5, 4381251), (7, 3129465), (15, 1460417), (21, 1043155), (35, 625893), (105, 208631)]