20199225

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{251}}^1$

素因数の和:330

約数の個数: 48

約数和(自身を含む): 35622720

約数和(自身を除く): 15423495

約数列:

[1, 3, 5, 15, 25, 29, 37, 75, 87, 111, 145, 185, 251, 435, 555, 725, 753, 925, 1073, 1255, 2175, 2775, 3219, 3765, 5365, 6275, 7279, 9287, 16095, 18825, 21837, 26825, 27861, 36395, 46435, 80475, 109185, 139305, 181975, 232175, 269323, 545925, 696525, 807969, 1346615, 4039845, 6733075, 20199225]

約数ペア:

[(1, 20199225), (3, 6733075), (5, 4039845), (15, 1346615), (25, 807969), (29, 696525), (37, 545925), (75, 269323), (87, 232175), (111, 181975), (145, 139305), (185, 109185), (251, 80475), (435, 46435), (555, 36395), (725, 27861), (753, 26825), (925, 21837), (1073, 18825), (1255, 16095), (2175, 9287), (2775, 7279), (3219, 6275), (3765, 5365)]