1284260

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{409}}^1$

素因数の和:575

約数の個数: 24

約数和(自身を含む): 2720760

約数和(自身を除く): 1436500

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 409, 628, 785, 818, 1570, 1636, 2045, 3140, 4090, 8180, 64213, 128426, 256852, 321065, 642130, 1284260]

約数ペア:

[(1, 1284260), (2, 642130), (4, 321065), (5, 256852), (10, 128426), (20, 64213), (157, 8180), (314, 4090), (409, 3140), (628, 2045), (785, 1636), (818, 1570)]