20978984

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{59}}^1\times {\mathrm{263}}^1$

素因数の和:354

約数の個数: 48

約数和(自身を含む): 43480800

約数和(自身を除く): 22501816

約数列:

[1, 2, 4, 8, 13, 26, 52, 59, 104, 118, 169, 236, 263, 338, 472, 526, 676, 767, 1052, 1352, 1534, 2104, 3068, 3419, 6136, 6838, 9971, 13676, 15517, 19942, 27352, 31034, 39884, 44447, 62068, 79768, 88894, 124136, 177788, 201721, 355576, 403442, 806884, 1613768, 2622373, 5244746, 10489492, 20978984]

約数ペア:

[(1, 20978984), (2, 10489492), (4, 5244746), (8, 2622373), (13, 1613768), (26, 806884), (52, 403442), (59, 355576), (104, 201721), (118, 177788), (169, 124136), (236, 88894), (263, 79768), (338, 62068), (472, 44447), (526, 39884), (676, 31034), (767, 27352), (1052, 19942), (1352, 15517), (1534, 13676), (2104, 9971), (3068, 6838), (3419, 6136)]