21052680

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{389}}^1$

素因数の和:455

約数の個数: 128

約数和(自身を含む): 70761600

約数和(自身を除く): 49708920

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 30, 33, 40, 41, 44, 55, 60, 66, 82, 88, 110, 120, 123, 132, 164, 165, 205, 220, 246, 264, 328, 330, 389, 410, 440, 451, 492, 615, 660, 778, 820, 902, 984, 1167, 1230, 1320, 1353, 1556, 1640, 1804, 1945, 2255, 2334, 2460, 2706, 3112, 3608, 3890, 4279, 4510, 4668, 4920, 5412, 5835, 6765, 7780, 8558, 9020, 9336, 10824, 11670, 12837, 13530, 15560, 15949, 17116, 18040, 21395, 23340, 25674, 27060, 31898, 34232, 42790, 46680, 47847, 51348, 54120, 63796, 64185, 79745, 85580, 95694, 102696, 127592, 128370, 159490, 171160, 175439, 191388, 239235, 256740, 318980, 350878, 382776, 478470, 513480, 526317, 637960, 701756, 877195, 956940, 1052634, 1403512, 1754390, 1913880, 2105268, 2631585, 3508780, 4210536, 5263170, 7017560, 10526340, 21052680]

約数ペア:

[(1, 21052680), (2, 10526340), (3, 7017560), (4, 5263170), (5, 4210536), (6, 3508780), (8, 2631585), (10, 2105268), (11, 1913880), (12, 1754390), (15, 1403512), (20, 1052634), (22, 956940), (24, 877195), (30, 701756), (33, 637960), (40, 526317), (41, 513480), (44, 478470), (55, 382776), (60, 350878), (66, 318980), (82, 256740), (88, 239235), (110, 191388), (120, 175439), (123, 171160), (132, 159490), (164, 128370), (165, 127592), (205, 102696), (220, 95694), (246, 85580), (264, 79745), (328, 64185), (330, 63796), (389, 54120), (410, 51348), (440, 47847), (451, 46680), (492, 42790), (615, 34232), (660, 31898), (778, 27060), (820, 25674), (902, 23340), (984, 21395), (1167, 18040), (1230, 17116), (1320, 15949), (1353, 15560), (1556, 13530), (1640, 12837), (1804, 11670), (1945, 10824), (2255, 9336), (2334, 9020), (2460, 8558), (2706, 7780), (3112, 6765), (3608, 5835), (3890, 5412), (4279, 4920), (4510, 4668)]