21768505

素因数分解:

$5^1\times {\mathrm{11}}^3\times {\mathrm{3271}}^1$

素因数の和:3309

約数の個数: 16

約数和(自身を含む): 28741248

約数和(自身を除く): 6972743

約数列:

[1, 5, 11, 55, 121, 605, 1331, 3271, 6655, 16355, 35981, 179905, 395791, 1978955, 4353701, 21768505]

約数ペア:

[(1, 21768505), (5, 4353701), (11, 1978955), (55, 395791), (121, 179905), (605, 35981), (1331, 16355), (3271, 6655)]