28406840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{401}}^1$

素因数の和:453

約数の個数: 128

約数和(自身を含む): 83358720

約数和(自身を除く): 54951880

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 23, 28, 35, 40, 44, 46, 55, 56, 70, 77, 88, 92, 110, 115, 140, 154, 161, 184, 220, 230, 253, 280, 308, 322, 385, 401, 440, 460, 506, 616, 644, 770, 802, 805, 920, 1012, 1265, 1288, 1540, 1604, 1610, 1771, 2005, 2024, 2530, 2807, 3080, 3208, 3220, 3542, 4010, 4411, 5060, 5614, 6440, 7084, 8020, 8822, 8855, 9223, 10120, 11228, 14035, 14168, 16040, 17644, 17710, 18446, 22055, 22456, 28070, 30877, 35288, 35420, 36892, 44110, 46115, 56140, 61754, 64561, 70840, 73784, 88220, 92230, 101453, 112280, 123508, 129122, 154385, 176440, 184460, 202906, 247016, 258244, 308770, 322805, 368920, 405812, 507265, 516488, 617540, 645610, 710171, 811624, 1014530, 1235080, 1291220, 1420342, 2029060, 2582440, 2840684, 3550855, 4058120, 5681368, 7101710, 14203420, 28406840]

約数ペア:

[(1, 28406840), (2, 14203420), (4, 7101710), (5, 5681368), (7, 4058120), (8, 3550855), (10, 2840684), (11, 2582440), (14, 2029060), (20, 1420342), (22, 1291220), (23, 1235080), (28, 1014530), (35, 811624), (40, 710171), (44, 645610), (46, 617540), (55, 516488), (56, 507265), (70, 405812), (77, 368920), (88, 322805), (92, 308770), (110, 258244), (115, 247016), (140, 202906), (154, 184460), (161, 176440), (184, 154385), (220, 129122), (230, 123508), (253, 112280), (280, 101453), (308, 92230), (322, 88220), (385, 73784), (401, 70840), (440, 64561), (460, 61754), (506, 56140), (616, 46115), (644, 44110), (770, 36892), (802, 35420), (805, 35288), (920, 30877), (1012, 28070), (1265, 22456), (1288, 22055), (1540, 18446), (1604, 17710), (1610, 17644), (1771, 16040), (2005, 14168), (2024, 14035), (2530, 11228), (2807, 10120), (3080, 9223), (3208, 8855), (3220, 8822), (3542, 8020), (4010, 7084), (4411, 6440), (5060, 5614)]