639998925

素因数分解:

$3^1\times 5^2\times {\mathrm{137}}^1\times {\mathrm{199}}^1\times {\mathrm{313}}^1$

素因数の和:662

約数の個数: 48

約数和(自身を含む): 1074633600

約数和(自身を除く): 434634675

約数列:

[1, 3, 5, 15, 25, 75, 137, 199, 313, 411, 597, 685, 939, 995, 1565, 2055, 2985, 3425, 4695, 4975, 7825, 10275, 14925, 23475, 27263, 42881, 62287, 81789, 128643, 136315, 186861, 214405, 311435, 408945, 643215, 681575, 934305, 1072025, 1557175, 2044725, 3216075, 4671525, 8533319, 25599957, 42666595, 127999785, 213332975, 639998925]

約数ペア:

[(1, 639998925), (3, 213332975), (5, 127999785), (15, 42666595), (25, 25599957), (75, 8533319), (137, 4671525), (199, 3216075), (313, 2044725), (411, 1557175), (597, 1072025), (685, 934305), (939, 681575), (995, 643215), (1565, 408945), (2055, 311435), (2985, 214405), (3425, 186861), (4695, 136315), (4975, 128643), (7825, 81789), (10275, 62287), (14925, 42881), (23475, 27263)]