20163280

素因数分解:

$2^4\times 5^1\times {\mathrm{103}}^1\times {\mathrm{2447}}^1$

素因数の和:2563

約数の個数: 40

約数和(自身を含む): 47354112

約数和(自身を除く): 27190832

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 103, 206, 412, 515, 824, 1030, 1648, 2060, 2447, 4120, 4894, 8240, 9788, 12235, 19576, 24470, 39152, 48940, 97880, 195760, 252041, 504082, 1008164, 1260205, 2016328, 2520410, 4032656, 5040820, 10081640, 20163280]

約数ペア:

[(1, 20163280), (2, 10081640), (4, 5040820), (5, 4032656), (8, 2520410), (10, 2016328), (16, 1260205), (20, 1008164), (40, 504082), (80, 252041), (103, 195760), (206, 97880), (412, 48940), (515, 39152), (824, 24470), (1030, 19576), (1648, 12235), (2060, 9788), (2447, 8240), (4120, 4894)]