20678560

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{499}}^1$

素因数の和:558

約数の個数: 96

約数和(自身を含む): 57456000

約数和(自身を除く): 36777440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 37, 40, 56, 70, 74, 80, 112, 140, 148, 160, 185, 224, 259, 280, 296, 370, 499, 518, 560, 592, 740, 998, 1036, 1120, 1184, 1295, 1480, 1996, 2072, 2495, 2590, 2960, 3493, 3992, 4144, 4990, 5180, 5920, 6986, 7984, 8288, 9980, 10360, 13972, 15968, 17465, 18463, 19960, 20720, 27944, 34930, 36926, 39920, 41440, 55888, 69860, 73852, 79840, 92315, 111776, 129241, 139720, 147704, 184630, 258482, 279440, 295408, 369260, 516964, 558880, 590816, 646205, 738520, 1033928, 1292410, 1477040, 2067856, 2584820, 2954080, 4135712, 5169640, 10339280, 20678560]

約数ペア:

[(1, 20678560), (2, 10339280), (4, 5169640), (5, 4135712), (7, 2954080), (8, 2584820), (10, 2067856), (14, 1477040), (16, 1292410), (20, 1033928), (28, 738520), (32, 646205), (35, 590816), (37, 558880), (40, 516964), (56, 369260), (70, 295408), (74, 279440), (80, 258482), (112, 184630), (140, 147704), (148, 139720), (160, 129241), (185, 111776), (224, 92315), (259, 79840), (280, 73852), (296, 69860), (370, 55888), (499, 41440), (518, 39920), (560, 36926), (592, 34930), (740, 27944), (998, 20720), (1036, 19960), (1120, 18463), (1184, 17465), (1295, 15968), (1480, 13972), (1996, 10360), (2072, 9980), (2495, 8288), (2590, 7984), (2960, 6986), (3493, 5920), (3992, 5180), (4144, 4990)]