21122005

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{127}}^1$

素因数の和:229

約数の個数: 32

約数和(自身を含む): 28016640

約数和(自身を除く): 6894635

約数列:

[1, 5, 29, 31, 37, 127, 145, 155, 185, 635, 899, 1073, 1147, 3683, 3937, 4495, 4699, 5365, 5735, 18415, 19685, 23495, 33263, 114173, 136271, 145669, 166315, 570865, 681355, 728345, 4224401, 21122005]

約数ペア:

[(1, 21122005), (5, 4224401), (29, 728345), (31, 681355), (37, 570865), (127, 166315), (145, 145669), (155, 136271), (185, 114173), (635, 33263), (899, 23495), (1073, 19685), (1147, 18415), (3683, 5735), (3937, 5365), (4495, 4699)]