647290

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{1321}}^1$

素因数の和:1342

約数の個数: 24

約数和(自身を含む): 1356372

約数和(自身を除く): 709082

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490, 1321, 2642, 6605, 9247, 13210, 18494, 46235, 64729, 92470, 129458, 323645, 647290]

約数ペア:

[(1, 647290), (2, 323645), (5, 129458), (7, 92470), (10, 64729), (14, 46235), (35, 18494), (49, 13210), (70, 9247), (98, 6605), (245, 2642), (490, 1321)]