20196880

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{389}}^1$

素因数の和:472

約数の個数: 80

約数和(自身を含む): 52228800

約数和(自身を除く): 32031920

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 59, 80, 88, 110, 118, 176, 220, 236, 295, 389, 440, 472, 590, 649, 778, 880, 944, 1180, 1298, 1556, 1945, 2360, 2596, 3112, 3245, 3890, 4279, 4720, 5192, 6224, 6490, 7780, 8558, 10384, 12980, 15560, 17116, 21395, 22951, 25960, 31120, 34232, 42790, 45902, 51920, 68464, 85580, 91804, 114755, 171160, 183608, 229510, 252461, 342320, 367216, 459020, 504922, 918040, 1009844, 1262305, 1836080, 2019688, 2524610, 4039376, 5049220, 10098440, 20196880]

約数ペア:

[(1, 20196880), (2, 10098440), (4, 5049220), (5, 4039376), (8, 2524610), (10, 2019688), (11, 1836080), (16, 1262305), (20, 1009844), (22, 918040), (40, 504922), (44, 459020), (55, 367216), (59, 342320), (80, 252461), (88, 229510), (110, 183608), (118, 171160), (176, 114755), (220, 91804), (236, 85580), (295, 68464), (389, 51920), (440, 45902), (472, 42790), (590, 34232), (649, 31120), (778, 25960), (880, 22951), (944, 21395), (1180, 17116), (1298, 15560), (1556, 12980), (1945, 10384), (2360, 8558), (2596, 7780), (3112, 6490), (3245, 6224), (3890, 5192), (4279, 4720)]