20921943

素因数分解:

$3^1\times 7^1\times {\mathrm{373}}^1\times {\mathrm{2671}}^1$

素因数の和:3054

約数の個数: 16

約数和(自身を含む): 31978496

約数和(自身を除く): 11056553

約数列:

[1, 3, 7, 21, 373, 1119, 2611, 2671, 7833, 8013, 18697, 56091, 996283, 2988849, 6973981, 20921943]

約数ペア:

[(1, 20921943), (3, 6973981), (7, 2988849), (21, 996283), (373, 56091), (1119, 18697), (2611, 8013), (2671, 7833)]