21551817

素因数分解:

$3^1\times 7^2\times {\mathrm{271}}^1\times {\mathrm{541}}^1$

素因数の和:829

約数の個数: 24

約数和(自身を含む): 33612672

約数和(自身を除く): 12060855

約数列:

[1, 3, 7, 21, 49, 147, 271, 541, 813, 1623, 1897, 3787, 5691, 11361, 13279, 26509, 39837, 79527, 146611, 439833, 1026277, 3078831, 7183939, 21551817]

約数ペア:

[(1, 21551817), (3, 7183939), (7, 3078831), (21, 1026277), (49, 439833), (147, 146611), (271, 79527), (541, 39837), (813, 26509), (1623, 13279), (1897, 11361), (3787, 5691)]