21156987

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{5197}}^1$

素因数の和:5282

約数の個数: 16

約数和(自身を含む): 29940480

約数和(自身を除く): 8783493

約数列:

[1, 3, 23, 59, 69, 177, 1357, 4071, 5197, 15591, 119531, 306623, 358593, 919869, 7052329, 21156987]

約数ペア:

[(1, 21156987), (3, 7052329), (23, 919869), (59, 358593), (69, 306623), (177, 119531), (1357, 15591), (4071, 5197)]