395780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{257}}^1$

素因数の和:284

約数の個数: 48

約数和(自身を含む): 1040256

約数和(自身を除く): 644476

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 257, 308, 385, 514, 770, 1028, 1285, 1540, 1799, 2570, 2827, 3598, 5140, 5654, 7196, 8995, 11308, 14135, 17990, 19789, 28270, 35980, 39578, 56540, 79156, 98945, 197890, 395780]

約数ペア:

[(1, 395780), (2, 197890), (4, 98945), (5, 79156), (7, 56540), (10, 39578), (11, 35980), (14, 28270), (20, 19789), (22, 17990), (28, 14135), (35, 11308), (44, 8995), (55, 7196), (70, 5654), (77, 5140), (110, 3598), (140, 2827), (154, 2570), (220, 1799), (257, 1540), (308, 1285), (385, 1028), (514, 770)]