209985255

素因数分解:

$3^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{23687}}^1$

素因数の和:23895

約数の個数: 24

約数和(自身を含む): 365837472

約数和(自身を除く): 155852217

約数列:

[1, 3, 5, 9, 15, 45, 197, 591, 985, 1773, 2955, 8865, 23687, 71061, 118435, 213183, 355305, 1065915, 4666339, 13999017, 23331695, 41997051, 69995085, 209985255]

約数ペア:

[(1, 209985255), (3, 69995085), (5, 41997051), (9, 23331695), (15, 13999017), (45, 4666339), (197, 1065915), (591, 355305), (985, 213183), (1773, 118435), (2955, 71061), (8865, 23687)]