21043280

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15473}}^1$

素因数の和:15503

約数の個数: 40

約数和(自身を含む): 51806952

約数和(自身を除く): 30763672

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15473, 30946, 61892, 77365, 123784, 154730, 247568, 263041, 309460, 526082, 618920, 1052164, 1237840, 1315205, 2104328, 2630410, 4208656, 5260820, 10521640, 21043280]

約数ペア:

[(1, 21043280), (2, 10521640), (4, 5260820), (5, 4208656), (8, 2630410), (10, 2104328), (16, 1315205), (17, 1237840), (20, 1052164), (34, 618920), (40, 526082), (68, 309460), (80, 263041), (85, 247568), (136, 154730), (170, 123784), (272, 77365), (340, 61892), (680, 30946), (1360, 15473)]