21051999

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{1021}}^1$

素因数の和:1135

約数の個数: 24

約数和(自身を含む): 31886400

約数和(自身を除く): 10834401

約数列:

[1, 3, 9, 29, 79, 87, 237, 261, 711, 1021, 2291, 3063, 6873, 9189, 20619, 29609, 80659, 88827, 241977, 266481, 725931, 2339111, 7017333, 21051999]

約数ペア:

[(1, 21051999), (3, 7017333), (9, 2339111), (29, 725931), (79, 266481), (87, 241977), (237, 88827), (261, 80659), (711, 29609), (1021, 20619), (2291, 9189), (3063, 6873)]