21058215

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1\times {\mathrm{353}}^1$

素因数の和:499

約数の個数: 32

約数和(自身を含む): 34969536

約数和(自身を除く): 13911321

約数列:

[1, 3, 5, 15, 41, 97, 123, 205, 291, 353, 485, 615, 1059, 1455, 1765, 3977, 5295, 11931, 14473, 19885, 34241, 43419, 59655, 72365, 102723, 171205, 217095, 513615, 1403881, 4211643, 7019405, 21058215]

約数ペア:

[(1, 21058215), (3, 7019405), (5, 4211643), (15, 1403881), (41, 513615), (97, 217095), (123, 171205), (205, 102723), (291, 72365), (353, 59655), (485, 43419), (615, 34241), (1059, 19885), (1455, 14473), (1765, 11931), (3977, 5295)]