987421820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{421}}^1\times {\mathrm{1523}}^1$

素因数の和:1971

約数の個数: 96

約数和(自身を含む): 2593092096

約数和(自身を除く): 1605670276

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 421, 770, 842, 1523, 1540, 1684, 2105, 2947, 3046, 4210, 4631, 5894, 6092, 7615, 8420, 9262, 10661, 11788, 14735, 15230, 16753, 18524, 21322, 23155, 29470, 30460, 32417, 33506, 42644, 46310, 53305, 58940, 64834, 67012, 83765, 92620, 106610, 117271, 129668, 162085, 167530, 213220, 234542, 324170, 335060, 469084, 586355, 641183, 648340, 1172710, 1282366, 2345420, 2564732, 3205915, 4488281, 6411830, 7053013, 8976562, 12823660, 14106026, 17953124, 22441405, 28212052, 35265065, 44882810, 49371091, 70530130, 89765620, 98742182, 141060260, 197484364, 246855455, 493710910, 987421820]

約数ペア:

[(1, 987421820), (2, 493710910), (4, 246855455), (5, 197484364), (7, 141060260), (10, 98742182), (11, 89765620), (14, 70530130), (20, 49371091), (22, 44882810), (28, 35265065), (35, 28212052), (44, 22441405), (55, 17953124), (70, 14106026), (77, 12823660), (110, 8976562), (140, 7053013), (154, 6411830), (220, 4488281), (308, 3205915), (385, 2564732), (421, 2345420), (770, 1282366), (842, 1172710), (1523, 648340), (1540, 641183), (1684, 586355), (2105, 469084), (2947, 335060), (3046, 324170), (4210, 234542), (4631, 213220), (5894, 167530), (6092, 162085), (7615, 129668), (8420, 117271), (9262, 106610), (10661, 92620), (11788, 83765), (14735, 67012), (15230, 64834), (16753, 58940), (18524, 53305), (21322, 46310), (23155, 42644), (29470, 33506), (30460, 32417)]