21227217

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{541}}^1$

素因数の和:625

約数の個数: 32

約数和(自身を含む): 32780160

約数和(自身を除く): 11552943

約数列:

[1, 3, 11, 29, 33, 41, 87, 123, 319, 451, 541, 957, 1189, 1353, 1623, 3567, 5951, 13079, 15689, 17853, 22181, 39237, 47067, 66543, 172579, 243991, 517737, 643249, 731973, 1929747, 7075739, 21227217]

約数ペア:

[(1, 21227217), (3, 7075739), (11, 1929747), (29, 731973), (33, 643249), (41, 517737), (87, 243991), (123, 172579), (319, 66543), (451, 47067), (541, 39237), (957, 22181), (1189, 17853), (1353, 15689), (1623, 13079), (3567, 5951)]