21642404

素因数分解:

$2^2\times 7^1\times {\mathrm{389}}^1\times {\mathrm{1987}}^1$

素因数の和:2387

約数の個数: 24

約数和(自身を含む): 43417920

約数和(自身を除く): 21775516

約数列:

[1, 2, 4, 7, 14, 28, 389, 778, 1556, 1987, 2723, 3974, 5446, 7948, 10892, 13909, 27818, 55636, 772943, 1545886, 3091772, 5410601, 10821202, 21642404]

約数ペア:

[(1, 21642404), (2, 10821202), (4, 5410601), (7, 3091772), (14, 1545886), (28, 772943), (389, 55636), (778, 27818), (1556, 13909), (1987, 10892), (2723, 7948), (3974, 5446)]