20802815

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1171}}^1$

素因数の和:1223

約数の個数: 32

約数和(自身を含む): 30378240

約数和(自身を除く): 9575425

約数列:

[1, 5, 11, 17, 19, 55, 85, 95, 187, 209, 323, 935, 1045, 1171, 1615, 3553, 5855, 12881, 17765, 19907, 22249, 64405, 99535, 111245, 218977, 244739, 378233, 1094885, 1223695, 1891165, 4160563, 20802815]

約数ペア:

[(1, 20802815), (5, 4160563), (11, 1891165), (17, 1223695), (19, 1094885), (55, 378233), (85, 244739), (95, 218977), (187, 111245), (209, 99535), (323, 64405), (935, 22249), (1045, 19907), (1171, 17765), (1615, 12881), (3553, 5855)]