221980520

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{199}}^1\times {\mathrm{353}}^1$

素因数の和:642

約数の個数: 64

約数和(自身を含む): 509760000

約数和(自身を除く): 287779480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 199, 316, 353, 395, 398, 632, 706, 790, 796, 995, 1412, 1580, 1592, 1765, 1990, 2824, 3160, 3530, 3980, 7060, 7960, 14120, 15721, 27887, 31442, 55774, 62884, 70247, 78605, 111548, 125768, 139435, 140494, 157210, 223096, 278870, 280988, 314420, 351235, 557740, 561976, 628840, 702470, 1115480, 1404940, 2809880, 5549513, 11099026, 22198052, 27747565, 44396104, 55495130, 110990260, 221980520]

約数ペア:

[(1, 221980520), (2, 110990260), (4, 55495130), (5, 44396104), (8, 27747565), (10, 22198052), (20, 11099026), (40, 5549513), (79, 2809880), (158, 1404940), (199, 1115480), (316, 702470), (353, 628840), (395, 561976), (398, 557740), (632, 351235), (706, 314420), (790, 280988), (796, 278870), (995, 223096), (1412, 157210), (1580, 140494), (1592, 139435), (1765, 125768), (1990, 111548), (2824, 78605), (3160, 70247), (3530, 62884), (3980, 55774), (7060, 31442), (7960, 27887), (14120, 15721)]