221486139

素因数分解:

$3^2\times 7^1\times {\mathrm{487}}^1\times {\mathrm{7219}}^1$

素因数の和:7719

約数の個数: 24

約数和(自身を含む): 366429440

約数和(自身を除く): 144943301

約数列:

[1, 3, 7, 9, 21, 63, 487, 1461, 3409, 4383, 7219, 10227, 21657, 30681, 50533, 64971, 151599, 454797, 3515653, 10546959, 24609571, 31640877, 73828713, 221486139]

約数ペア:

[(1, 221486139), (3, 73828713), (7, 31640877), (9, 24609571), (21, 10546959), (63, 3515653), (487, 454797), (1461, 151599), (3409, 64971), (4383, 50533), (7219, 30681), (10227, 21657)]