21107140

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{2713}}^1$

素因数の和:3111

約数の個数: 24

約数和(自身を含む): 44455320

約数和(自身を除く): 23348180

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 2713, 3890, 5426, 7780, 10852, 13565, 27130, 54260, 1055357, 2110714, 4221428, 5276785, 10553570, 21107140]

約数ペア:

[(1, 21107140), (2, 10553570), (4, 5276785), (5, 4221428), (10, 2110714), (20, 1055357), (389, 54260), (778, 27130), (1556, 13565), (1945, 10852), (2713, 7780), (3890, 5426)]