21739947

素因数分解:

$3^1\times {\mathrm{101}}^1\times {\mathrm{157}}^1\times {\mathrm{457}}^1$

素因数の和:718

約数の個数: 16

約数和(自身を含む): 29524512

約数和(自身を除く): 7784565

約数列:

[1, 3, 101, 157, 303, 457, 471, 1371, 15857, 46157, 47571, 71749, 138471, 215247, 7246649, 21739947]

約数ペア:

[(1, 21739947), (3, 7246649), (101, 215247), (157, 138471), (303, 71749), (457, 47571), (471, 46157), (1371, 15857)]