21803887

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{2309}}^1$

素因数の和:2406

約数の個数: 16

約数和(自身を含む): 26611200

約数和(自身を除く): 4807313

約数列:

[1, 7, 19, 71, 133, 497, 1349, 2309, 9443, 16163, 43871, 163939, 307097, 1147573, 3114841, 21803887]

約数ペア:

[(1, 21803887), (7, 3114841), (19, 1147573), (71, 307097), (133, 163939), (497, 43871), (1349, 16163), (2309, 9443)]