21781116

素因数分解:

$2^2\times 3^3\times 7^1\times {\mathrm{47}}^1\times {\mathrm{613}}^1$

素因数の和:680

約数の個数: 96

約数和(自身を含む): 66017280

約数和(自身を除く): 44236164

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 27, 28, 36, 42, 47, 54, 63, 84, 94, 108, 126, 141, 188, 189, 252, 282, 329, 378, 423, 564, 613, 658, 756, 846, 987, 1226, 1269, 1316, 1692, 1839, 1974, 2452, 2538, 2961, 3678, 3948, 4291, 5076, 5517, 5922, 7356, 8582, 8883, 11034, 11844, 12873, 16551, 17164, 17766, 22068, 25746, 28811, 33102, 35532, 38619, 51492, 57622, 66204, 77238, 86433, 115244, 115857, 154476, 172866, 201677, 231714, 259299, 345732, 403354, 463428, 518598, 605031, 777897, 806708, 1037196, 1210062, 1555794, 1815093, 2420124, 3111588, 3630186, 5445279, 7260372, 10890558, 21781116]

約数ペア:

[(1, 21781116), (2, 10890558), (3, 7260372), (4, 5445279), (6, 3630186), (7, 3111588), (9, 2420124), (12, 1815093), (14, 1555794), (18, 1210062), (21, 1037196), (27, 806708), (28, 777897), (36, 605031), (42, 518598), (47, 463428), (54, 403354), (63, 345732), (84, 259299), (94, 231714), (108, 201677), (126, 172866), (141, 154476), (188, 115857), (189, 115244), (252, 86433), (282, 77238), (329, 66204), (378, 57622), (423, 51492), (564, 38619), (613, 35532), (658, 33102), (756, 28811), (846, 25746), (987, 22068), (1226, 17766), (1269, 17164), (1316, 16551), (1692, 12873), (1839, 11844), (1974, 11034), (2452, 8883), (2538, 8582), (2961, 7356), (3678, 5922), (3948, 5517), (4291, 5076)]