21979251

素因数分解:

$3^2\times 7^1\times {\mathrm{409}}^1\times {\mathrm{853}}^1$

素因数の和:1275

約数の個数: 24

約数和(自身を含む): 36414560

約数和(自身を除く): 14435309

約数列:

[1, 3, 7, 9, 21, 63, 409, 853, 1227, 2559, 2863, 3681, 5971, 7677, 8589, 17913, 25767, 53739, 348877, 1046631, 2442139, 3139893, 7326417, 21979251]

約数ペア:

[(1, 21979251), (3, 7326417), (7, 3139893), (9, 2442139), (21, 1046631), (63, 348877), (409, 53739), (853, 25767), (1227, 17913), (2559, 8589), (2863, 7677), (3681, 5971)]