20988110

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{1129}}^1$

素因数の和:1173

約数の個数: 48

約数和(自身を含む): 44666640

約数和(自身を除く): 23678530

約数列:

[1, 2, 5, 10, 11, 13, 22, 26, 55, 65, 110, 130, 143, 169, 286, 338, 715, 845, 1129, 1430, 1690, 1859, 2258, 3718, 5645, 9295, 11290, 12419, 14677, 18590, 24838, 29354, 62095, 73385, 124190, 146770, 161447, 190801, 322894, 381602, 807235, 954005, 1614470, 1908010, 2098811, 4197622, 10494055, 20988110]

約数ペア:

[(1, 20988110), (2, 10494055), (5, 4197622), (10, 2098811), (11, 1908010), (13, 1614470), (22, 954005), (26, 807235), (55, 381602), (65, 322894), (110, 190801), (130, 161447), (143, 146770), (169, 124190), (286, 73385), (338, 62095), (715, 29354), (845, 24838), (1129, 18590), (1430, 14677), (1690, 12419), (1859, 11290), (2258, 9295), (3718, 5645)]