20725120

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:132

約数の個数: 128

約数和(自身を含む): 55520640

約数和(自身を除く): 34795520

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 47, 52, 53, 64, 65, 80, 94, 104, 106, 128, 130, 160, 188, 208, 212, 235, 260, 265, 320, 376, 416, 424, 470, 520, 530, 611, 640, 689, 752, 832, 848, 940, 1040, 1060, 1222, 1378, 1504, 1664, 1696, 1880, 2080, 2120, 2444, 2491, 2756, 3008, 3055, 3392, 3445, 3760, 4160, 4240, 4888, 4982, 5512, 6016, 6110, 6784, 6890, 7520, 8320, 8480, 9776, 9964, 11024, 12220, 12455, 13780, 15040, 16960, 19552, 19928, 22048, 24440, 24910, 27560, 30080, 32383, 33920, 39104, 39856, 44096, 48880, 49820, 55120, 64766, 78208, 79712, 88192, 97760, 99640, 110240, 129532, 159424, 161915, 195520, 199280, 220480, 259064, 318848, 323830, 391040, 398560, 440960, 518128, 647660, 797120, 1036256, 1295320, 1594240, 2072512, 2590640, 4145024, 5181280, 10362560, 20725120]

約数ペア:

[(1, 20725120), (2, 10362560), (4, 5181280), (5, 4145024), (8, 2590640), (10, 2072512), (13, 1594240), (16, 1295320), (20, 1036256), (26, 797120), (32, 647660), (40, 518128), (47, 440960), (52, 398560), (53, 391040), (64, 323830), (65, 318848), (80, 259064), (94, 220480), (104, 199280), (106, 195520), (128, 161915), (130, 159424), (160, 129532), (188, 110240), (208, 99640), (212, 97760), (235, 88192), (260, 79712), (265, 78208), (320, 64766), (376, 55120), (416, 49820), (424, 48880), (470, 44096), (520, 39856), (530, 39104), (611, 33920), (640, 32383), (689, 30080), (752, 27560), (832, 24910), (848, 24440), (940, 22048), (1040, 19928), (1060, 19552), (1222, 16960), (1378, 15040), (1504, 13780), (1664, 12455), (1696, 12220), (1880, 11024), (2080, 9964), (2120, 9776), (2444, 8480), (2491, 8320), (2756, 7520), (3008, 6890), (3055, 6784), (3392, 6110), (3445, 6016), (3760, 5512), (4160, 4982), (4240, 4888)]