20065520

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{307}}^1$

素因数の和:382

約数の個数: 80

約数和(自身を含む): 50413440

約数和(自身を除く): 30347920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 43, 76, 80, 86, 95, 152, 172, 190, 215, 304, 307, 344, 380, 430, 614, 688, 760, 817, 860, 1228, 1520, 1535, 1634, 1720, 2456, 3070, 3268, 3440, 4085, 4912, 5833, 6140, 6536, 8170, 11666, 12280, 13072, 13201, 16340, 23332, 24560, 26402, 29165, 32680, 46664, 52804, 58330, 65360, 66005, 93328, 105608, 116660, 132010, 211216, 233320, 250819, 264020, 466640, 501638, 528040, 1003276, 1056080, 1254095, 2006552, 2508190, 4013104, 5016380, 10032760, 20065520]

約数ペア:

[(1, 20065520), (2, 10032760), (4, 5016380), (5, 4013104), (8, 2508190), (10, 2006552), (16, 1254095), (19, 1056080), (20, 1003276), (38, 528040), (40, 501638), (43, 466640), (76, 264020), (80, 250819), (86, 233320), (95, 211216), (152, 132010), (172, 116660), (190, 105608), (215, 93328), (304, 66005), (307, 65360), (344, 58330), (380, 52804), (430, 46664), (614, 32680), (688, 29165), (760, 26402), (817, 24560), (860, 23332), (1228, 16340), (1520, 13201), (1535, 13072), (1634, 12280), (1720, 11666), (2456, 8170), (3070, 6536), (3268, 6140), (3440, 5833), (4085, 4912)]