81478040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{290993}}^1$

素因数の和:291011

約数の個数: 32

約数和(自身を含む): 209515680

約数和(自身を除く): 128037640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 290993, 581986, 1163972, 1454965, 2036951, 2327944, 2909930, 4073902, 5819860, 8147804, 10184755, 11639720, 16295608, 20369510, 40739020, 81478040]

約数ペア:

[(1, 81478040), (2, 40739020), (4, 20369510), (5, 16295608), (7, 11639720), (8, 10184755), (10, 8147804), (14, 5819860), (20, 4073902), (28, 2909930), (35, 2327944), (40, 2036951), (56, 1454965), (70, 1163972), (140, 581986), (280, 290993)]