251017347

素因数分解:

$3^1\times 7^4\times {\mathrm{34849}}^1$

素因数の和:34880

約数の個数: 20

約数和(自身を含む): 390459400

約数和(自身を除く): 139442053

約数列:

[1, 3, 7, 21, 49, 147, 343, 1029, 2401, 7203, 34849, 104547, 243943, 731829, 1707601, 5122803, 11953207, 35859621, 83672449, 251017347]

約数ペア:

[(1, 251017347), (3, 83672449), (7, 35859621), (21, 11953207), (49, 5122803), (147, 1707601), (343, 731829), (1029, 243943), (2401, 104547), (7203, 34849)]