216879145

素因数分解:

$5^1\times 7^2\times {\mathrm{641}}^1\times {\mathrm{1381}}^1$

素因数の和:2041

約数の個数: 24

約数和(自身を含む): 303437448

約数和(自身を除く): 86558303

約数列:

[1, 5, 7, 35, 49, 245, 641, 1381, 3205, 4487, 6905, 9667, 22435, 31409, 48335, 67669, 157045, 338345, 885221, 4426105, 6196547, 30982735, 43375829, 216879145]

約数ペア:

[(1, 216879145), (5, 43375829), (7, 30982735), (35, 6196547), (49, 4426105), (245, 885221), (641, 338345), (1381, 157045), (3205, 67669), (4487, 48335), (6905, 31409), (9667, 22435)]