20440970

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{643}}^1$

素因数の和:695

約数の個数: 48

約数和(自身を含む): 42704928

約数和(自身を除く): 22263958

約数列:

[1, 2, 5, 10, 11, 17, 22, 34, 55, 85, 110, 170, 187, 289, 374, 578, 643, 935, 1286, 1445, 1870, 2890, 3179, 3215, 6358, 6430, 7073, 10931, 14146, 15895, 21862, 31790, 35365, 54655, 70730, 109310, 120241, 185827, 240482, 371654, 601205, 929135, 1202410, 1858270, 2044097, 4088194, 10220485, 20440970]

約数ペア:

[(1, 20440970), (2, 10220485), (5, 4088194), (10, 2044097), (11, 1858270), (17, 1202410), (22, 929135), (34, 601205), (55, 371654), (85, 240482), (110, 185827), (170, 120241), (187, 109310), (289, 70730), (374, 54655), (578, 35365), (643, 31790), (935, 21862), (1286, 15895), (1445, 14146), (1870, 10931), (2890, 7073), (3179, 6430), (3215, 6358)]