21519771

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{11261}}^1$

素因数の和:11291

約数の個数: 24

約数和(自身を含む): 35948304

約数和(自身を除く): 14428533

約数列:

[1, 3, 7, 13, 21, 39, 49, 91, 147, 273, 637, 1911, 11261, 33783, 78827, 146393, 236481, 439179, 551789, 1024751, 1655367, 3074253, 7173257, 21519771]

約数ペア:

[(1, 21519771), (3, 7173257), (7, 3074253), (13, 1655367), (21, 1024751), (39, 551789), (49, 439179), (91, 236481), (147, 146393), (273, 78827), (637, 33783), (1911, 11261)]