19997576

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{109}}^1$

素因数の和:222

約数の個数: 64

約数和(自身を含む): 42768000

約数和(自身を除く): 22770424

約数列:

[1, 2, 4, 8, 17, 19, 34, 38, 68, 71, 76, 109, 136, 142, 152, 218, 284, 323, 436, 568, 646, 872, 1207, 1292, 1349, 1853, 2071, 2414, 2584, 2698, 3706, 4142, 4828, 5396, 7412, 7739, 8284, 9656, 10792, 14824, 15478, 16568, 22933, 30956, 35207, 45866, 61912, 70414, 91732, 131563, 140828, 147041, 183464, 263126, 281656, 294082, 526252, 588164, 1052504, 1176328, 2499697, 4999394, 9998788, 19997576]

約数ペア:

[(1, 19997576), (2, 9998788), (4, 4999394), (8, 2499697), (17, 1176328), (19, 1052504), (34, 588164), (38, 526252), (68, 294082), (71, 281656), (76, 263126), (109, 183464), (136, 147041), (142, 140828), (152, 131563), (218, 91732), (284, 70414), (323, 61912), (436, 45866), (568, 35207), (646, 30956), (872, 22933), (1207, 16568), (1292, 15478), (1349, 14824), (1853, 10792), (2071, 9656), (2414, 8284), (2584, 7739), (2698, 7412), (3706, 5396), (4142, 4828)]