31878280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{257}}^1\times {\mathrm{443}}^1$

素因数の和:718

約数の個数: 64

約数和(自身を含む): 82477440

約数和(自身を除く): 50599160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 257, 280, 443, 514, 886, 1028, 1285, 1772, 1799, 2056, 2215, 2570, 3101, 3544, 3598, 4430, 5140, 6202, 7196, 8860, 8995, 10280, 12404, 14392, 15505, 17720, 17990, 24808, 31010, 35980, 62020, 71960, 113851, 124040, 227702, 455404, 569255, 796957, 910808, 1138510, 1593914, 2277020, 3187828, 3984785, 4554040, 6375656, 7969570, 15939140, 31878280]

約数ペア:

[(1, 31878280), (2, 15939140), (4, 7969570), (5, 6375656), (7, 4554040), (8, 3984785), (10, 3187828), (14, 2277020), (20, 1593914), (28, 1138510), (35, 910808), (40, 796957), (56, 569255), (70, 455404), (140, 227702), (257, 124040), (280, 113851), (443, 71960), (514, 62020), (886, 35980), (1028, 31010), (1285, 24808), (1772, 17990), (1799, 17720), (2056, 15505), (2215, 14392), (2570, 12404), (3101, 10280), (3544, 8995), (3598, 8860), (4430, 7196), (5140, 6202)]