21915831

素因数分解:

$3^1\times 7^1\times {\mathrm{647}}^1\times {\mathrm{1613}}^1$

素因数の和:2270

約数の個数: 16

約数和(自身を含む): 33467904

約数和(自身を除く): 11552073

約数列:

[1, 3, 7, 21, 647, 1613, 1941, 4529, 4839, 11291, 13587, 33873, 1043611, 3130833, 7305277, 21915831]

約数ペア:

[(1, 21915831), (3, 7305277), (7, 3130833), (21, 1043611), (647, 33873), (1613, 13587), (1941, 11291), (4529, 4839)]