21000427984

素因数分解:

$2^4\times {\mathrm{181}}^1\times {\mathrm{7251529}}^1$

素因数の和:7251718

約数の個数: 20

約数和(自身を含む): 40913132260

約数和(自身を除く): 19912704276

約数列:

[1, 2, 4, 8, 16, 181, 362, 724, 1448, 2896, 7251529, 14503058, 29006116, 58012232, 116024464, 1312526749, 2625053498, 5250106996, 10500213992, 21000427984]

約数ペア:

[(1, 21000427984), (2, 10500213992), (4, 5250106996), (8, 2625053498), (16, 1312526749), (181, 116024464), (362, 58012232), (724, 29006116), (1448, 14503058), (2896, 7251529)]