21382855

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{523}}^1$

素因数の和:595

約数の個数: 32

約数和(自身を含む): 30106944

約数和(自身を除く): 8724089

約数列:

[1, 5, 13, 17, 37, 65, 85, 185, 221, 481, 523, 629, 1105, 2405, 2615, 3145, 6799, 8177, 8891, 19351, 33995, 40885, 44455, 96755, 115583, 251563, 328967, 577915, 1257815, 1644835, 4276571, 21382855]

約数ペア:

[(1, 21382855), (5, 4276571), (13, 1644835), (17, 1257815), (37, 577915), (65, 328967), (85, 251563), (185, 115583), (221, 96755), (481, 44455), (523, 40885), (629, 33995), (1105, 19351), (2405, 8891), (2615, 8177), (3145, 6799)]