20748825

素因数分解:

$3^3\times 5^2\times {\mathrm{59}}^1\times {\mathrm{521}}^1$

素因数の和:599

約数の個数: 48

約数和(自身を含む): 38836800

約数和(自身を除く): 18087975

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 59, 75, 135, 177, 225, 295, 521, 531, 675, 885, 1475, 1563, 1593, 2605, 2655, 4425, 4689, 7815, 7965, 13025, 13275, 14067, 23445, 30739, 39075, 39825, 70335, 92217, 117225, 153695, 276651, 351675, 461085, 768475, 829953, 1383255, 2305425, 4149765, 6916275, 20748825]

約数ペア:

[(1, 20748825), (3, 6916275), (5, 4149765), (9, 2305425), (15, 1383255), (25, 829953), (27, 768475), (45, 461085), (59, 351675), (75, 276651), (135, 153695), (177, 117225), (225, 92217), (295, 70335), (521, 39825), (531, 39075), (675, 30739), (885, 23445), (1475, 14067), (1563, 13275), (1593, 13025), (2605, 7965), (2655, 7815), (4425, 4689)]