102905720

素因数分解:

$2^3\times 5^1\times {\mathrm{643}}^1\times {\mathrm{4001}}^1$

素因数の和:4655

約数の個数: 32

約数和(自身を含む): 231955920

約数和(自身を除く): 129050200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 643, 1286, 2572, 3215, 4001, 5144, 6430, 8002, 12860, 16004, 20005, 25720, 32008, 40010, 80020, 160040, 2572643, 5145286, 10290572, 12863215, 20581144, 25726430, 51452860, 102905720]

約数ペア:

[(1, 102905720), (2, 51452860), (4, 25726430), (5, 20581144), (8, 12863215), (10, 10290572), (20, 5145286), (40, 2572643), (643, 160040), (1286, 80020), (2572, 40010), (3215, 32008), (4001, 25720), (5144, 20005), (6430, 16004), (8002, 12860)]