21336560

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{5443}}^1$

素因数の和:5470

約数の個数: 60

約数和(自身を含む): 57717288

約数和(自身を除く): 36380728

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 5443, 10886, 21772, 27215, 38101, 43544, 54430, 76202, 87088, 108860, 152404, 190505, 217720, 266707, 304808, 381010, 435440, 533414, 609616, 762020, 1066828, 1333535, 1524040, 2133656, 2667070, 3048080, 4267312, 5334140, 10668280, 21336560]

約数ペア:

[(1, 21336560), (2, 10668280), (4, 5334140), (5, 4267312), (7, 3048080), (8, 2667070), (10, 2133656), (14, 1524040), (16, 1333535), (20, 1066828), (28, 762020), (35, 609616), (40, 533414), (49, 435440), (56, 381010), (70, 304808), (80, 266707), (98, 217720), (112, 190505), (140, 152404), (196, 108860), (245, 87088), (280, 76202), (392, 54430), (490, 43544), (560, 38101), (784, 27215), (980, 21772), (1960, 10886), (3920, 5443)]