81231020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{312427}}^1$

素因数の和:312449

約数の個数: 24

約数和(自身を含む): 183707664

約数和(自身を除く): 102476644

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 312427, 624854, 1249708, 1562135, 3124270, 4061551, 6248540, 8123102, 16246204, 20307755, 40615510, 81231020]

約数ペア:

[(1, 81231020), (2, 40615510), (4, 20307755), (5, 16246204), (10, 8123102), (13, 6248540), (20, 4061551), (26, 3124270), (52, 1562135), (65, 1249708), (130, 624854), (260, 312427)]