20417280

素因数分解:

$2^8\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{409}}^1$

素因数の和:446

約数の個数: 144

約数和(自身を含む): 70395360

約数和(自身を除く): 49978080

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 32, 39, 40, 48, 52, 60, 64, 65, 78, 80, 96, 104, 120, 128, 130, 156, 160, 192, 195, 208, 240, 256, 260, 312, 320, 384, 390, 409, 416, 480, 520, 624, 640, 768, 780, 818, 832, 960, 1040, 1227, 1248, 1280, 1560, 1636, 1664, 1920, 2045, 2080, 2454, 2496, 3120, 3272, 3328, 3840, 4090, 4160, 4908, 4992, 5317, 6135, 6240, 6544, 8180, 8320, 9816, 9984, 10634, 12270, 12480, 13088, 15951, 16360, 16640, 19632, 21268, 24540, 24960, 26176, 26585, 31902, 32720, 39264, 42536, 49080, 49920, 52352, 53170, 63804, 65440, 78528, 79755, 85072, 98160, 104704, 106340, 127608, 130880, 157056, 159510, 170144, 196320, 212680, 255216, 261760, 314112, 319020, 340288, 392640, 425360, 510432, 523520, 638040, 680576, 785280, 850720, 1020864, 1276080, 1361152, 1570560, 1701440, 2041728, 2552160, 3402880, 4083456, 5104320, 6805760, 10208640, 20417280]

約数ペア:

[(1, 20417280), (2, 10208640), (3, 6805760), (4, 5104320), (5, 4083456), (6, 3402880), (8, 2552160), (10, 2041728), (12, 1701440), (13, 1570560), (15, 1361152), (16, 1276080), (20, 1020864), (24, 850720), (26, 785280), (30, 680576), (32, 638040), (39, 523520), (40, 510432), (48, 425360), (52, 392640), (60, 340288), (64, 319020), (65, 314112), (78, 261760), (80, 255216), (96, 212680), (104, 196320), (120, 170144), (128, 159510), (130, 157056), (156, 130880), (160, 127608), (192, 106340), (195, 104704), (208, 98160), (240, 85072), (256, 79755), (260, 78528), (312, 65440), (320, 63804), (384, 53170), (390, 52352), (409, 49920), (416, 49080), (480, 42536), (520, 39264), (624, 32720), (640, 31902), (768, 26585), (780, 26176), (818, 24960), (832, 24540), (960, 21268), (1040, 19632), (1227, 16640), (1248, 16360), (1280, 15951), (1560, 13088), (1636, 12480), (1664, 12270), (1920, 10634), (2045, 9984), (2080, 9816), (2454, 8320), (2496, 8180), (3120, 6544), (3272, 6240), (3328, 6135), (3840, 5317), (4090, 4992), (4160, 4908)]