21408420

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{163}}^1\times {\mathrm{199}}^1$

素因数の和:385

約数の個数: 96

約数和(自身を含む): 66124800

約数和(自身を除く): 44716380

約数列:

[1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 44, 55, 60, 66, 110, 132, 163, 165, 199, 220, 326, 330, 398, 489, 597, 652, 660, 796, 815, 978, 995, 1194, 1630, 1793, 1956, 1990, 2189, 2388, 2445, 2985, 3260, 3586, 3980, 4378, 4890, 5379, 5970, 6567, 7172, 8756, 8965, 9780, 10758, 10945, 11940, 13134, 17930, 21516, 21890, 26268, 26895, 32437, 32835, 35860, 43780, 53790, 64874, 65670, 97311, 107580, 129748, 131340, 162185, 194622, 324370, 356807, 389244, 486555, 648740, 713614, 973110, 1070421, 1427228, 1784035, 1946220, 2140842, 3568070, 4281684, 5352105, 7136140, 10704210, 21408420]

約数ペア:

[(1, 21408420), (2, 10704210), (3, 7136140), (4, 5352105), (5, 4281684), (6, 3568070), (10, 2140842), (11, 1946220), (12, 1784035), (15, 1427228), (20, 1070421), (22, 973110), (30, 713614), (33, 648740), (44, 486555), (55, 389244), (60, 356807), (66, 324370), (110, 194622), (132, 162185), (163, 131340), (165, 129748), (199, 107580), (220, 97311), (326, 65670), (330, 64874), (398, 53790), (489, 43780), (597, 35860), (652, 32835), (660, 32437), (796, 26895), (815, 26268), (978, 21890), (995, 21516), (1194, 17930), (1630, 13134), (1793, 11940), (1956, 10945), (1990, 10758), (2189, 9780), (2388, 8965), (2445, 8756), (2985, 7172), (3260, 6567), (3586, 5970), (3980, 5379), (4378, 4890)]