21398245

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{113}}^1\times {\mathrm{313}}^1$

素因数の和:453

約数の個数: 24

約数和(自身を含む): 28565208

約数和(自身を除く): 7166963

約数列:

[1, 5, 11, 55, 113, 121, 313, 565, 605, 1243, 1565, 3443, 6215, 13673, 17215, 35369, 37873, 68365, 176845, 189365, 389059, 1945295, 4279649, 21398245]

約数ペア:

[(1, 21398245), (5, 4279649), (11, 1945295), (55, 389059), (113, 189365), (121, 176845), (313, 68365), (565, 37873), (605, 35369), (1243, 17215), (1565, 13673), (3443, 6215)]