21190911

素因数分解:

$3^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{101}}^1\times {\mathrm{103}}^1$

素因数の和:311

約数の個数: 32

約数和(自身を含む): 33266688

約数和(自身を除く): 12075777

約数列:

[1, 3, 7, 21, 97, 101, 103, 291, 303, 309, 679, 707, 721, 2037, 2121, 2163, 9797, 9991, 10403, 29391, 29973, 31209, 68579, 69937, 72821, 205737, 209811, 218463, 1009091, 3027273, 7063637, 21190911]

約数ペア:

[(1, 21190911), (3, 7063637), (7, 3027273), (21, 1009091), (97, 218463), (101, 209811), (103, 205737), (291, 72821), (303, 69937), (309, 68579), (679, 31209), (707, 29973), (721, 29391), (2037, 10403), (2121, 9991), (2163, 9797)]