20742700

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{173}}^1$

素因数の和:307

約数の個数: 72

約数和(自身を含む): 49840560

約数和(自身を除く): 29097860

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 109, 110, 173, 218, 220, 275, 346, 436, 545, 550, 692, 865, 1090, 1100, 1199, 1730, 1903, 2180, 2398, 2725, 3460, 3806, 4325, 4796, 5450, 5995, 7612, 8650, 9515, 10900, 11990, 17300, 18857, 19030, 23980, 29975, 37714, 38060, 47575, 59950, 75428, 94285, 95150, 119900, 188570, 190300, 207427, 377140, 414854, 471425, 829708, 942850, 1037135, 1885700, 2074270, 4148540, 5185675, 10371350, 20742700]

約数ペア:

[(1, 20742700), (2, 10371350), (4, 5185675), (5, 4148540), (10, 2074270), (11, 1885700), (20, 1037135), (22, 942850), (25, 829708), (44, 471425), (50, 414854), (55, 377140), (100, 207427), (109, 190300), (110, 188570), (173, 119900), (218, 95150), (220, 94285), (275, 75428), (346, 59950), (436, 47575), (545, 38060), (550, 37714), (692, 29975), (865, 23980), (1090, 19030), (1100, 18857), (1199, 17300), (1730, 11990), (1903, 10900), (2180, 9515), (2398, 8650), (2725, 7612), (3460, 5995), (3806, 5450), (4325, 4796)]