21997575

素因数分解:

$3^6\times 5^2\times {\mathrm{17}}^1\times {\mathrm{71}}^1$

素因数の和:116

約数の個数: 84

約数和(自身を含む): 43912368

約数和(自身を除く): 21914793

約数列:

[1, 3, 5, 9, 15, 17, 25, 27, 45, 51, 71, 75, 81, 85, 135, 153, 213, 225, 243, 255, 355, 405, 425, 459, 639, 675, 729, 765, 1065, 1207, 1215, 1275, 1377, 1775, 1917, 2025, 2295, 3195, 3621, 3645, 3825, 4131, 5325, 5751, 6035, 6075, 6885, 9585, 10863, 11475, 12393, 15975, 17253, 18105, 18225, 20655, 28755, 30175, 32589, 34425, 47925, 51759, 54315, 61965, 86265, 90525, 97767, 103275, 143775, 162945, 258795, 271575, 293301, 309825, 431325, 488835, 814725, 879903, 1293975, 1466505, 2444175, 4399515, 7332525, 21997575]

約数ペア:

[(1, 21997575), (3, 7332525), (5, 4399515), (9, 2444175), (15, 1466505), (17, 1293975), (25, 879903), (27, 814725), (45, 488835), (51, 431325), (71, 309825), (75, 293301), (81, 271575), (85, 258795), (135, 162945), (153, 143775), (213, 103275), (225, 97767), (243, 90525), (255, 86265), (355, 61965), (405, 54315), (425, 51759), (459, 47925), (639, 34425), (675, 32589), (729, 30175), (765, 28755), (1065, 20655), (1207, 18225), (1215, 18105), (1275, 17253), (1377, 15975), (1775, 12393), (1917, 11475), (2025, 10863), (2295, 9585), (3195, 6885), (3621, 6075), (3645, 6035), (3825, 5751), (4131, 5325)]