20054815

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{241}}^1$

素因数の和:363

約数の個数: 32

約数和(自身を含む): 28226880

約数和(自身を除く): 8172065

約数列:

[1, 5, 11, 17, 55, 85, 89, 187, 241, 445, 935, 979, 1205, 1513, 2651, 4097, 4895, 7565, 13255, 16643, 20485, 21449, 45067, 83215, 107245, 225335, 235939, 364633, 1179695, 1823165, 4010963, 20054815]

約数ペア:

[(1, 20054815), (5, 4010963), (11, 1823165), (17, 1179695), (55, 364633), (85, 235939), (89, 225335), (187, 107245), (241, 83215), (445, 45067), (935, 21449), (979, 20485), (1205, 16643), (1513, 13255), (2651, 7565), (4097, 4895)]