18989307

素因数分解:

$3^2\times {\mathrm{89}}^1\times {\mathrm{151}}^1\times {\mathrm{157}}^1$

素因数の和:403

約数の個数: 24

約数和(自身を含む): 28098720

約数和(自身を除く): 9109413

約数列:

[1, 3, 9, 89, 151, 157, 267, 453, 471, 801, 1359, 1413, 13439, 13973, 23707, 40317, 41919, 71121, 120951, 125757, 213363, 2109923, 6329769, 18989307]

約数ペア:

[(1, 18989307), (3, 6329769), (9, 2109923), (89, 213363), (151, 125757), (157, 120951), (267, 71121), (453, 41919), (471, 40317), (801, 23707), (1359, 13973), (1413, 13439)]