278316717

素因数分解:

$3^1\times 7^4\times {\mathrm{38639}}^1$

素因数の和:38670

約数の個数: 20

約数和(自身を含む): 432922560

約数和(自身を除く): 154605843

約数列:

[1, 3, 7, 21, 49, 147, 343, 1029, 2401, 7203, 38639, 115917, 270473, 811419, 1893311, 5679933, 13253177, 39759531, 92772239, 278316717]

約数ペア:

[(1, 278316717), (3, 92772239), (7, 39759531), (21, 13253177), (49, 5679933), (147, 1893311), (343, 811419), (1029, 270473), (2401, 115917), (7203, 38639)]