19994312

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{263}}^1$

素因数の和:342

約数の個数: 64

約数和(自身を含む): 43908480

約数和(自身を除く): 23914168

約数列:

[1, 2, 4, 8, 13, 17, 26, 34, 43, 52, 68, 86, 104, 136, 172, 221, 263, 344, 442, 526, 559, 731, 884, 1052, 1118, 1462, 1768, 2104, 2236, 2924, 3419, 4471, 4472, 5848, 6838, 8942, 9503, 11309, 13676, 17884, 19006, 22618, 27352, 35768, 38012, 45236, 58123, 76024, 90472, 116246, 147017, 192253, 232492, 294034, 384506, 464984, 588068, 769012, 1176136, 1538024, 2499289, 4998578, 9997156, 19994312]

約数ペア:

[(1, 19994312), (2, 9997156), (4, 4998578), (8, 2499289), (13, 1538024), (17, 1176136), (26, 769012), (34, 588068), (43, 464984), (52, 384506), (68, 294034), (86, 232492), (104, 192253), (136, 147017), (172, 116246), (221, 90472), (263, 76024), (344, 58123), (442, 45236), (526, 38012), (559, 35768), (731, 27352), (884, 22618), (1052, 19006), (1118, 17884), (1462, 13676), (1768, 11309), (2104, 9503), (2236, 8942), (2924, 6838), (3419, 5848), (4471, 4472)]