21016892

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{389}}^1\times {\mathrm{1039}}^1$

素因数の和:1445

約数の個数: 24

約数和(自身を含む): 39748800

約数和(自身を除く): 18731908

約数列:

[1, 2, 4, 13, 26, 52, 389, 778, 1039, 1556, 2078, 4156, 5057, 10114, 13507, 20228, 27014, 54028, 404171, 808342, 1616684, 5254223, 10508446, 21016892]

約数ペア:

[(1, 21016892), (2, 10508446), (4, 5254223), (13, 1616684), (26, 808342), (52, 404171), (389, 54028), (778, 27014), (1039, 20228), (1556, 13507), (2078, 10114), (4156, 5057)]