21594815

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{397}}^1$

素因数の和:479

約数の個数: 32

約数和(自身を含む): 30260736

約数和(自身を除く): 8665921

約数列:

[1, 5, 11, 23, 43, 55, 115, 215, 253, 397, 473, 989, 1265, 1985, 2365, 4367, 4945, 9131, 10879, 17071, 21835, 45655, 54395, 85355, 100441, 187781, 392633, 502205, 938905, 1963165, 4318963, 21594815]

約数ペア:

[(1, 21594815), (5, 4318963), (11, 1963165), (23, 938905), (43, 502205), (55, 392633), (115, 187781), (215, 100441), (253, 85355), (397, 54395), (473, 45655), (989, 21835), (1265, 17071), (1985, 10879), (2365, 9131), (4367, 4945)]