21896560

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{641}}^1$

素因数の和:722

約数の個数: 80

約数和(自身を含む): 59228352

約数和(自身を除く): 37331792

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 61, 70, 80, 112, 122, 140, 244, 280, 305, 427, 488, 560, 610, 641, 854, 976, 1220, 1282, 1708, 2135, 2440, 2564, 3205, 3416, 4270, 4487, 4880, 5128, 6410, 6832, 8540, 8974, 10256, 12820, 17080, 17948, 22435, 25640, 34160, 35896, 39101, 44870, 51280, 71792, 78202, 89740, 156404, 179480, 195505, 273707, 312808, 358960, 391010, 547414, 625616, 782020, 1094828, 1368535, 1564040, 2189656, 2737070, 3128080, 4379312, 5474140, 10948280, 21896560]

約数ペア:

[(1, 21896560), (2, 10948280), (4, 5474140), (5, 4379312), (7, 3128080), (8, 2737070), (10, 2189656), (14, 1564040), (16, 1368535), (20, 1094828), (28, 782020), (35, 625616), (40, 547414), (56, 391010), (61, 358960), (70, 312808), (80, 273707), (112, 195505), (122, 179480), (140, 156404), (244, 89740), (280, 78202), (305, 71792), (427, 51280), (488, 44870), (560, 39101), (610, 35896), (641, 34160), (854, 25640), (976, 22435), (1220, 17948), (1282, 17080), (1708, 12820), (2135, 10256), (2440, 8974), (2564, 8540), (3205, 6832), (3416, 6410), (4270, 5128), (4487, 4880)]