21261591

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{7901}}^1$

素因数の和:7943

約数の個数: 24

約数和(自身を含む): 34515936

約数和(自身を除く): 13254345

約数列:

[1, 3, 9, 13, 23, 39, 69, 117, 207, 299, 897, 2691, 7901, 23703, 71109, 102713, 181723, 308139, 545169, 924417, 1635507, 2362399, 7087197, 21261591]

約数ペア:

[(1, 21261591), (3, 7087197), (9, 2362399), (13, 1635507), (23, 924417), (39, 545169), (69, 308139), (117, 181723), (207, 102713), (299, 71109), (897, 23703), (2691, 7901)]