21928280

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1$

素因数の和:145

約数の個数: 128

約数和(自身を含む): 58924800

約数和(自身を除く): 36996520

約数列:

[1, 2, 4, 5, 8, 10, 11, 19, 20, 22, 38, 40, 43, 44, 55, 61, 76, 86, 88, 95, 110, 122, 152, 172, 190, 209, 215, 220, 244, 305, 344, 380, 418, 430, 440, 473, 488, 610, 671, 760, 817, 836, 860, 946, 1045, 1159, 1220, 1342, 1634, 1672, 1720, 1892, 2090, 2318, 2365, 2440, 2623, 2684, 3268, 3355, 3784, 4085, 4180, 4636, 4730, 5246, 5368, 5795, 6536, 6710, 8170, 8360, 8987, 9272, 9460, 10492, 11590, 12749, 13115, 13420, 16340, 17974, 18920, 20984, 23180, 25498, 26230, 26840, 28853, 32680, 35948, 44935, 46360, 49837, 50996, 52460, 57706, 63745, 71896, 89870, 99674, 101992, 104920, 115412, 127490, 144265, 179740, 199348, 230824, 249185, 254980, 288530, 359480, 398696, 498370, 509960, 548207, 577060, 996740, 1096414, 1154120, 1993480, 2192828, 2741035, 4385656, 5482070, 10964140, 21928280]

約数ペア:

[(1, 21928280), (2, 10964140), (4, 5482070), (5, 4385656), (8, 2741035), (10, 2192828), (11, 1993480), (19, 1154120), (20, 1096414), (22, 996740), (38, 577060), (40, 548207), (43, 509960), (44, 498370), (55, 398696), (61, 359480), (76, 288530), (86, 254980), (88, 249185), (95, 230824), (110, 199348), (122, 179740), (152, 144265), (172, 127490), (190, 115412), (209, 104920), (215, 101992), (220, 99674), (244, 89870), (305, 71896), (344, 63745), (380, 57706), (418, 52460), (430, 50996), (440, 49837), (473, 46360), (488, 44935), (610, 35948), (671, 32680), (760, 28853), (817, 26840), (836, 26230), (860, 25498), (946, 23180), (1045, 20984), (1159, 18920), (1220, 17974), (1342, 16340), (1634, 13420), (1672, 13115), (1720, 12749), (1892, 11590), (2090, 10492), (2318, 9460), (2365, 9272), (2440, 8987), (2623, 8360), (2684, 8170), (3268, 6710), (3355, 6536), (3784, 5795), (4085, 5368), (4180, 5246), (4636, 4730)]