18990818

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{127}}^1\times {\mathrm{971}}^1$

素因数の和:1118

約数の個数: 32

約数和(自身を含む): 35831808

約数和(自身を除く): 16840990

約数列:

[1, 2, 7, 11, 14, 22, 77, 127, 154, 254, 889, 971, 1397, 1778, 1942, 2794, 6797, 9779, 10681, 13594, 19558, 21362, 74767, 123317, 149534, 246634, 863219, 1356487, 1726438, 2712974, 9495409, 18990818]

約数ペア:

[(1, 18990818), (2, 9495409), (7, 2712974), (11, 1726438), (14, 1356487), (22, 863219), (77, 246634), (127, 149534), (154, 123317), (254, 74767), (889, 21362), (971, 19558), (1397, 13594), (1778, 10681), (1942, 9779), (2794, 6797)]