21181575

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{449}}^1$

素因数の和:516

約数の個数: 48

約数和(自身を含む): 38167200

約数和(自身を除く): 16985625

約数列:

[1, 3, 5, 15, 17, 25, 37, 51, 75, 85, 111, 185, 255, 425, 449, 555, 629, 925, 1275, 1347, 1887, 2245, 2775, 3145, 6735, 7633, 9435, 11225, 15725, 16613, 22899, 33675, 38165, 47175, 49839, 83065, 114495, 190825, 249195, 282421, 415325, 572475, 847263, 1245975, 1412105, 4236315, 7060525, 21181575]

約数ペア:

[(1, 21181575), (3, 7060525), (5, 4236315), (15, 1412105), (17, 1245975), (25, 847263), (37, 572475), (51, 415325), (75, 282421), (85, 249195), (111, 190825), (185, 114495), (255, 83065), (425, 49839), (449, 47175), (555, 38165), (629, 33675), (925, 22899), (1275, 16613), (1347, 15725), (1887, 11225), (2245, 9435), (2775, 7633), (3145, 6735)]