251860

素因数分解:

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

素因数の和:280

約数の個数: 36

約数和(自身を含む): 617652

約数和(自身を除く): 365792

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 257, 490, 514, 980, 1028, 1285, 1799, 2570, 3598, 5140, 7196, 8995, 12593, 17990, 25186, 35980, 50372, 62965, 125930, 251860]

約数ペア:

[(1, 251860), (2, 125930), (4, 62965), (5, 50372), (7, 35980), (10, 25186), (14, 17990), (20, 12593), (28, 8995), (35, 7196), (49, 5140), (70, 3598), (98, 2570), (140, 1799), (196, 1285), (245, 1028), (257, 980), (490, 514)]