20854970

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^2\times {\mathrm{53}}^1\times {\mathrm{109}}^1$

素因数の和:207

約数の個数: 48

約数和(自身を含む): 40736520

約数和(自身を除く): 19881550

約数列:

[1, 2, 5, 10, 19, 38, 53, 95, 106, 109, 190, 218, 265, 361, 530, 545, 722, 1007, 1090, 1805, 2014, 2071, 3610, 4142, 5035, 5777, 10070, 10355, 11554, 19133, 20710, 28885, 38266, 39349, 57770, 78698, 95665, 109763, 191330, 196745, 219526, 393490, 548815, 1097630, 2085497, 4170994, 10427485, 20854970]

約数ペア:

[(1, 20854970), (2, 10427485), (5, 4170994), (10, 2085497), (19, 1097630), (38, 548815), (53, 393490), (95, 219526), (106, 196745), (109, 191330), (190, 109763), (218, 95665), (265, 78698), (361, 57770), (530, 39349), (545, 38266), (722, 28885), (1007, 20710), (1090, 19133), (1805, 11554), (2014, 10355), (2071, 10070), (3610, 5777), (4142, 5035)]