21781435

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{7793}}^1$

素因数の和:7854

約数の個数: 16

約数和(自身を含む): 28806624

約数和(自身を除く): 7025189

約数列:

[1, 5, 13, 43, 65, 215, 559, 2795, 7793, 38965, 101309, 335099, 506545, 1675495, 4356287, 21781435]

約数ペア:

[(1, 21781435), (5, 4356287), (13, 1675495), (43, 506545), (65, 335099), (215, 101309), (559, 38965), (2795, 7793)]