21428939

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{167}}^1\times {\mathrm{797}}^1$

素因数の和:994

約数の個数: 16

約数和(自身を含む): 25740288

約数和(自身を除く): 4311349

約数列:

[1, 7, 23, 161, 167, 797, 1169, 3841, 5579, 18331, 26887, 128317, 133099, 931693, 3061277, 21428939]

約数ペア:

[(1, 21428939), (7, 3061277), (23, 931693), (161, 133099), (167, 128317), (797, 26887), (1169, 18331), (3841, 5579)]