18904760

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{631}}^1$

素因数の和:756

約数の個数: 64

約数和(自身を含む): 49144320

約数和(自身を除く): 30239560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 107, 140, 214, 280, 428, 535, 631, 749, 856, 1070, 1262, 1498, 2140, 2524, 2996, 3155, 3745, 4280, 4417, 5048, 5992, 6310, 7490, 8834, 12620, 14980, 17668, 22085, 25240, 29960, 35336, 44170, 67517, 88340, 135034, 176680, 270068, 337585, 472619, 540136, 675170, 945238, 1350340, 1890476, 2363095, 2700680, 3780952, 4726190, 9452380, 18904760]

約数ペア:

[(1, 18904760), (2, 9452380), (4, 4726190), (5, 3780952), (7, 2700680), (8, 2363095), (10, 1890476), (14, 1350340), (20, 945238), (28, 675170), (35, 540136), (40, 472619), (56, 337585), (70, 270068), (107, 176680), (140, 135034), (214, 88340), (280, 67517), (428, 44170), (535, 35336), (631, 29960), (749, 25240), (856, 22085), (1070, 17668), (1262, 14980), (1498, 12620), (2140, 8834), (2524, 7490), (2996, 6310), (3155, 5992), (3745, 5048), (4280, 4417)]