20399325

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{113}}^1$

素因数の和:238

約数の個数: 48

約数和(自身を含む): 35622720

約数和(自身を除く): 15223395

約数列:

[1, 3, 5, 15, 25, 29, 75, 83, 87, 113, 145, 249, 339, 415, 435, 565, 725, 1245, 1695, 2075, 2175, 2407, 2825, 3277, 6225, 7221, 8475, 9379, 9831, 12035, 16385, 28137, 36105, 46895, 49155, 60175, 81925, 140685, 180525, 234475, 245775, 271991, 703425, 815973, 1359955, 4079865, 6799775, 20399325]

約数ペア:

[(1, 20399325), (3, 6799775), (5, 4079865), (15, 1359955), (25, 815973), (29, 703425), (75, 271991), (83, 245775), (87, 234475), (113, 180525), (145, 140685), (249, 81925), (339, 60175), (415, 49155), (435, 46895), (565, 36105), (725, 28137), (1245, 16385), (1695, 12035), (2075, 9831), (2175, 9379), (2407, 8475), (2825, 7221), (3277, 6225)]