21806155

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{547}}^1$

素因数の和:643

約数の個数: 32

約数和(自身を含む): 32196096

約数和(自身を除く): 10389941

約数列:

[1, 5, 7, 17, 35, 67, 85, 119, 335, 469, 547, 595, 1139, 2345, 2735, 3829, 5695, 7973, 9299, 19145, 36649, 39865, 46495, 65093, 183245, 256543, 325465, 623033, 1282715, 3115165, 4361231, 21806155]

約数ペア:

[(1, 21806155), (5, 4361231), (7, 3115165), (17, 1282715), (35, 623033), (67, 325465), (85, 256543), (119, 183245), (335, 65093), (469, 46495), (547, 39865), (595, 36649), (1139, 19145), (2345, 9299), (2735, 7973), (3829, 5695)]