649914880

素因数分解:

$2^9\times 5^1\times {\mathrm{127}}^1\times {\mathrm{1999}}^1$

素因数の和:2149

約数の個数: 80

約数和(自身を含む): 1571328000

約数和(自身を除く): 921413120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 127, 128, 160, 254, 256, 320, 508, 512, 635, 640, 1016, 1270, 1280, 1999, 2032, 2540, 2560, 3998, 4064, 5080, 7996, 8128, 9995, 10160, 15992, 16256, 19990, 20320, 31984, 32512, 39980, 40640, 63968, 65024, 79960, 81280, 127936, 159920, 162560, 253873, 255872, 319840, 325120, 507746, 511744, 639680, 1015492, 1023488, 1269365, 1279360, 2030984, 2538730, 2558720, 4061968, 5077460, 5117440, 8123936, 10154920, 16247872, 20309840, 32495744, 40619680, 64991488, 81239360, 129982976, 162478720, 324957440, 649914880]

約数ペア:

[(1, 649914880), (2, 324957440), (4, 162478720), (5, 129982976), (8, 81239360), (10, 64991488), (16, 40619680), (20, 32495744), (32, 20309840), (40, 16247872), (64, 10154920), (80, 8123936), (127, 5117440), (128, 5077460), (160, 4061968), (254, 2558720), (256, 2538730), (320, 2030984), (508, 1279360), (512, 1269365), (635, 1023488), (640, 1015492), (1016, 639680), (1270, 511744), (1280, 507746), (1999, 325120), (2032, 319840), (2540, 255872), (2560, 253873), (3998, 162560), (4064, 159920), (5080, 127936), (7996, 81280), (8128, 79960), (9995, 65024), (10160, 63968), (15992, 40640), (16256, 39980), (19990, 32512), (20320, 31984)]