20991410

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{8297}}^1$

素因数の和:8338

約数の個数: 32

約数和(自身を含む): 43016832

約数和(自身を除く): 22025422

約数列:

[1, 2, 5, 10, 11, 22, 23, 46, 55, 110, 115, 230, 253, 506, 1265, 2530, 8297, 16594, 41485, 82970, 91267, 182534, 190831, 381662, 456335, 912670, 954155, 1908310, 2099141, 4198282, 10495705, 20991410]

約数ペア:

[(1, 20991410), (2, 10495705), (5, 4198282), (10, 2099141), (11, 1908310), (22, 954155), (23, 912670), (46, 456335), (55, 381662), (110, 190831), (115, 182534), (230, 91267), (253, 82970), (506, 41485), (1265, 16594), (2530, 8297)]