21000638900

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{1097}}^1\times {\mathrm{11261}}^1$

素因数の和:12389

約数の個数: 72

約数和(自身を含む): 48300330456

約数和(自身を除く): 27299691556

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 34, 50, 68, 85, 100, 170, 340, 425, 850, 1097, 1700, 2194, 4388, 5485, 10970, 11261, 18649, 21940, 22522, 27425, 37298, 45044, 54850, 56305, 74596, 93245, 109700, 112610, 186490, 191437, 225220, 281525, 372980, 382874, 466225, 563050, 765748, 932450, 957185, 1126100, 1864900, 1914370, 3828740, 4785925, 9571850, 12353317, 19143700, 24706634, 49413268, 61766585, 123533170, 210006389, 247066340, 308832925, 420012778, 617665850, 840025556, 1050031945, 1235331700, 2100063890, 4200127780, 5250159725, 10500319450, 21000638900]

約数ペア:

[(1, 21000638900), (2, 10500319450), (4, 5250159725), (5, 4200127780), (10, 2100063890), (17, 1235331700), (20, 1050031945), (25, 840025556), (34, 617665850), (50, 420012778), (68, 308832925), (85, 247066340), (100, 210006389), (170, 123533170), (340, 61766585), (425, 49413268), (850, 24706634), (1097, 19143700), (1700, 12353317), (2194, 9571850), (4388, 4785925), (5485, 3828740), (10970, 1914370), (11261, 1864900), (18649, 1126100), (21940, 957185), (22522, 932450), (27425, 765748), (37298, 563050), (45044, 466225), (54850, 382874), (56305, 372980), (74596, 281525), (93245, 225220), (109700, 191437), (112610, 186490)]