21195839

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{193}}^1\times {\mathrm{541}}^1$

素因数の和:770

約数の個数: 16

約数和(自身を含む): 25235520

約数和(自身を除く): 4039681

約数列:

[1, 7, 29, 193, 203, 541, 1351, 3787, 5597, 15689, 39179, 104413, 109823, 730891, 3027977, 21195839]

約数ペア:

[(1, 21195839), (7, 3027977), (29, 730891), (193, 109823), (203, 104413), (541, 39179), (1351, 15689), (3787, 5597)]