21256480

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{18979}}^1$

素因数の和:19001

約数の個数: 48

約数和(自身を含む): 57395520

約数和(自身を除く): 36139040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 280, 560, 1120, 18979, 37958, 75916, 94895, 132853, 151832, 189790, 265706, 303664, 379580, 531412, 607328, 664265, 759160, 1062824, 1328530, 1518320, 2125648, 2657060, 3036640, 4251296, 5314120, 10628240, 21256480]

約数ペア:

[(1, 21256480), (2, 10628240), (4, 5314120), (5, 4251296), (7, 3036640), (8, 2657060), (10, 2125648), (14, 1518320), (16, 1328530), (20, 1062824), (28, 759160), (32, 664265), (35, 607328), (40, 531412), (56, 379580), (70, 303664), (80, 265706), (112, 189790), (140, 151832), (160, 132853), (224, 94895), (280, 75916), (560, 37958), (1120, 18979)]