20667155

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{191}}^1$

素因数の和:299

約数の個数: 32

約数和(自身を含む): 28200960

約数和(自身を除く): 7533805

約数列:

[1, 5, 17, 19, 67, 85, 95, 191, 323, 335, 955, 1139, 1273, 1615, 3247, 3629, 5695, 6365, 12797, 16235, 18145, 21641, 61693, 63985, 108205, 217549, 243143, 308465, 1087745, 1215715, 4133431, 20667155]

約数ペア:

[(1, 20667155), (5, 4133431), (17, 1215715), (19, 1087745), (67, 308465), (85, 243143), (95, 217549), (191, 108205), (323, 63985), (335, 61693), (955, 21641), (1139, 18145), (1273, 16235), (1615, 12797), (3247, 6365), (3629, 5695)]