28115120

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{743}}^1$

素因数の和:810

約数の個数: 80

約数和(自身を含む): 73066752

約数和(自身を除く): 44951632

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 43, 44, 55, 80, 86, 88, 110, 172, 176, 215, 220, 344, 430, 440, 473, 688, 743, 860, 880, 946, 1486, 1720, 1892, 2365, 2972, 3440, 3715, 3784, 4730, 5944, 7430, 7568, 8173, 9460, 11888, 14860, 16346, 18920, 29720, 31949, 32692, 37840, 40865, 59440, 63898, 65384, 81730, 127796, 130768, 159745, 163460, 255592, 319490, 326920, 351439, 511184, 638980, 653840, 702878, 1277960, 1405756, 1757195, 2555920, 2811512, 3514390, 5623024, 7028780, 14057560, 28115120]

約数ペア:

[(1, 28115120), (2, 14057560), (4, 7028780), (5, 5623024), (8, 3514390), (10, 2811512), (11, 2555920), (16, 1757195), (20, 1405756), (22, 1277960), (40, 702878), (43, 653840), (44, 638980), (55, 511184), (80, 351439), (86, 326920), (88, 319490), (110, 255592), (172, 163460), (176, 159745), (215, 130768), (220, 127796), (344, 81730), (430, 65384), (440, 63898), (473, 59440), (688, 40865), (743, 37840), (860, 32692), (880, 31949), (946, 29720), (1486, 18920), (1720, 16346), (1892, 14860), (2365, 11888), (2972, 9460), (3440, 8173), (3715, 7568), (3784, 7430), (4730, 5944)]