21877289

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{181}}^1\times {\mathrm{557}}^1$

素因数の和:776

約数の個数: 16

約数和(自身を含む): 25998336

約数和(自身を除く): 4121047

約数列:

[1, 7, 31, 181, 217, 557, 1267, 3899, 5611, 17267, 39277, 100817, 120869, 705719, 3125327, 21877289]

約数ペア:

[(1, 21877289), (7, 3125327), (31, 705719), (181, 120869), (217, 100817), (557, 39277), (1267, 17267), (3899, 5611)]