12781895

素因数分解:

$5^1\times 7^3\times {\mathrm{29}}^1\times {\mathrm{257}}^1$

素因数の和:312

約数の個数: 32

約数和(自身を含む): 18576000

約数和(自身を除く): 5794105

約数列:

[1, 5, 7, 29, 35, 49, 145, 203, 245, 257, 343, 1015, 1285, 1421, 1715, 1799, 7105, 7453, 8995, 9947, 12593, 37265, 49735, 52171, 62965, 88151, 260855, 365197, 440755, 1825985, 2556379, 12781895]

約数ペア:

[(1, 12781895), (5, 2556379), (7, 1825985), (29, 440755), (35, 365197), (49, 260855), (145, 88151), (203, 62965), (245, 52171), (257, 49735), (343, 37265), (1015, 12593), (1285, 9947), (1421, 8995), (1715, 7453), (1799, 7105)]