25720191

素因数分解:

$3^2\times 7^1\times {\mathrm{631}}^1\times {\mathrm{647}}^1$

素因数の和:1291

約数の個数: 24

約数和(自身を含む): 42591744

約数和(自身を除く): 16871553

約数列:

[1, 3, 7, 9, 21, 63, 631, 647, 1893, 1941, 4417, 4529, 5679, 5823, 13251, 13587, 39753, 40761, 408257, 1224771, 2857799, 3674313, 8573397, 25720191]

約数ペア:

[(1, 25720191), (3, 8573397), (7, 3674313), (9, 2857799), (21, 1224771), (63, 408257), (631, 40761), (647, 39753), (1893, 13587), (1941, 13251), (4417, 5823), (4529, 5679)]