78921080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{521}}^1\times {\mathrm{541}}^1$

素因数の和:1080

約数の個数: 64

約数和(自身を含む): 203705280

約数和(自身を除く): 124784200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 521, 541, 1042, 1082, 2084, 2164, 2605, 2705, 3647, 3787, 4168, 4328, 5210, 5410, 7294, 7574, 10420, 10820, 14588, 15148, 18235, 18935, 20840, 21640, 29176, 30296, 36470, 37870, 72940, 75740, 145880, 151480, 281861, 563722, 1127444, 1409305, 1973027, 2254888, 2818610, 3946054, 5637220, 7892108, 9865135, 11274440, 15784216, 19730270, 39460540, 78921080]

約数ペア:

[(1, 78921080), (2, 39460540), (4, 19730270), (5, 15784216), (7, 11274440), (8, 9865135), (10, 7892108), (14, 5637220), (20, 3946054), (28, 2818610), (35, 2254888), (40, 1973027), (56, 1409305), (70, 1127444), (140, 563722), (280, 281861), (521, 151480), (541, 145880), (1042, 75740), (1082, 72940), (2084, 37870), (2164, 36470), (2605, 30296), (2705, 29176), (3647, 21640), (3787, 20840), (4168, 18935), (4328, 18235), (5210, 15148), (5410, 14588), (7294, 10820), (7574, 10420)]