21655612

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{101}}^1\times {\mathrm{443}}^1$

素因数の和:570

約数の個数: 36

約数和(自身を含む): 42163128

約数和(自身を除く): 20507516

約数列:

[1, 2, 4, 11, 22, 44, 101, 121, 202, 242, 404, 443, 484, 886, 1111, 1772, 2222, 4444, 4873, 9746, 12221, 19492, 24442, 44743, 48884, 53603, 89486, 107206, 178972, 214412, 492173, 984346, 1968692, 5413903, 10827806, 21655612]

約数ペア:

[(1, 21655612), (2, 10827806), (4, 5413903), (11, 1968692), (22, 984346), (44, 492173), (101, 214412), (121, 178972), (202, 107206), (242, 89486), (404, 53603), (443, 48884), (484, 44743), (886, 24442), (1111, 19492), (1772, 12221), (2222, 9746), (4444, 4873)]