20160520

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{647}}^1$

素因数の和:718

約数の個数: 64

約数和(自身を含む): 48988800

約数和(自身を除く): 28828280

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 41, 76, 82, 95, 152, 164, 190, 205, 328, 380, 410, 647, 760, 779, 820, 1294, 1558, 1640, 2588, 3116, 3235, 3895, 5176, 6232, 6470, 7790, 12293, 12940, 15580, 24586, 25880, 26527, 31160, 49172, 53054, 61465, 98344, 106108, 122930, 132635, 212216, 245860, 265270, 491720, 504013, 530540, 1008026, 1061080, 2016052, 2520065, 4032104, 5040130, 10080260, 20160520]

約数ペア:

[(1, 20160520), (2, 10080260), (4, 5040130), (5, 4032104), (8, 2520065), (10, 2016052), (19, 1061080), (20, 1008026), (38, 530540), (40, 504013), (41, 491720), (76, 265270), (82, 245860), (95, 212216), (152, 132635), (164, 122930), (190, 106108), (205, 98344), (328, 61465), (380, 53054), (410, 49172), (647, 31160), (760, 26527), (779, 25880), (820, 24586), (1294, 15580), (1558, 12940), (1640, 12293), (2588, 7790), (3116, 6470), (3235, 6232), (3895, 5176)]