21221325

素因数分解:

$3^3\times 5^2\times {\mathrm{149}}^1\times {\mathrm{211}}^1$

素因数の和:379

約数の個数: 48

約数和(自身を含む): 39432000

約数和(自身を除く): 18210675

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 135, 149, 211, 225, 447, 633, 675, 745, 1055, 1341, 1899, 2235, 3165, 3725, 4023, 5275, 5697, 6705, 9495, 11175, 15825, 20115, 28485, 31439, 33525, 47475, 94317, 100575, 142425, 157195, 282951, 471585, 785975, 848853, 1414755, 2357925, 4244265, 7073775, 21221325]

約数ペア:

[(1, 21221325), (3, 7073775), (5, 4244265), (9, 2357925), (15, 1414755), (25, 848853), (27, 785975), (45, 471585), (75, 282951), (135, 157195), (149, 142425), (211, 100575), (225, 94317), (447, 47475), (633, 33525), (675, 31439), (745, 28485), (1055, 20115), (1341, 15825), (1899, 11175), (2235, 9495), (3165, 6705), (3725, 5697), (4023, 5275)]