20315000

素因数分解:

$2^3\times 5^4\times {\mathrm{17}}^1\times {\mathrm{239}}^1$

素因数の和:282

約数の個数: 80

約数和(自身を含む): 50608800

約数和(自身を除く): 30293800

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 25, 34, 40, 50, 68, 85, 100, 125, 136, 170, 200, 239, 250, 340, 425, 478, 500, 625, 680, 850, 956, 1000, 1195, 1250, 1700, 1912, 2125, 2390, 2500, 3400, 4063, 4250, 4780, 5000, 5975, 8126, 8500, 9560, 10625, 11950, 16252, 17000, 20315, 21250, 23900, 29875, 32504, 40630, 42500, 47800, 59750, 81260, 85000, 101575, 119500, 149375, 162520, 203150, 239000, 298750, 406300, 507875, 597500, 812600, 1015750, 1195000, 2031500, 2539375, 4063000, 5078750, 10157500, 20315000]

約数ペア:

[(1, 20315000), (2, 10157500), (4, 5078750), (5, 4063000), (8, 2539375), (10, 2031500), (17, 1195000), (20, 1015750), (25, 812600), (34, 597500), (40, 507875), (50, 406300), (68, 298750), (85, 239000), (100, 203150), (125, 162520), (136, 149375), (170, 119500), (200, 101575), (239, 85000), (250, 81260), (340, 59750), (425, 47800), (478, 42500), (500, 40630), (625, 32504), (680, 29875), (850, 23900), (956, 21250), (1000, 20315), (1195, 17000), (1250, 16252), (1700, 11950), (1912, 10625), (2125, 9560), (2390, 8500), (2500, 8126), (3400, 5975), (4063, 5000), (4250, 4780)]