20785974400

素因数分解:

$2^7\times 5^2\times {\mathrm{79}}^1\times {\mathrm{82223}}^1$

素因数の和:82326

約数の個数: 96

約数和(自身を含む): 51998457600

約数和(自身を除く): 31212483200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 79, 80, 100, 128, 158, 160, 200, 316, 320, 395, 400, 632, 640, 790, 800, 1264, 1580, 1600, 1975, 2528, 3160, 3200, 3950, 5056, 6320, 7900, 10112, 12640, 15800, 25280, 31600, 50560, 63200, 82223, 126400, 164446, 252800, 328892, 411115, 657784, 822230, 1315568, 1644460, 2055575, 2631136, 3288920, 4111150, 5262272, 6495617, 6577840, 8222300, 10524544, 12991234, 13155680, 16444600, 25982468, 26311360, 32478085, 32889200, 51964936, 52622720, 64956170, 65778400, 103929872, 129912340, 131556800, 162390425, 207859744, 259824680, 263113600, 324780850, 415719488, 519649360, 649561700, 831438976, 1039298720, 1299123400, 2078597440, 2598246800, 4157194880, 5196493600, 10392987200, 20785974400]

約数ペア:

[(1, 20785974400), (2, 10392987200), (4, 5196493600), (5, 4157194880), (8, 2598246800), (10, 2078597440), (16, 1299123400), (20, 1039298720), (25, 831438976), (32, 649561700), (40, 519649360), (50, 415719488), (64, 324780850), (79, 263113600), (80, 259824680), (100, 207859744), (128, 162390425), (158, 131556800), (160, 129912340), (200, 103929872), (316, 65778400), (320, 64956170), (395, 52622720), (400, 51964936), (632, 32889200), (640, 32478085), (790, 26311360), (800, 25982468), (1264, 16444600), (1580, 13155680), (1600, 12991234), (1975, 10524544), (2528, 8222300), (3160, 6577840), (3200, 6495617), (3950, 5262272), (5056, 4111150), (6320, 3288920), (7900, 2631136), (10112, 2055575), (12640, 1644460), (15800, 1315568), (25280, 822230), (31600, 657784), (50560, 411115), (63200, 328892), (82223, 252800), (126400, 164446)]