21001886

素因数分解:

$2^1\times {\mathrm{53}}^1\times {\mathrm{239}}^1\times {\mathrm{829}}^1$

素因数の和:1123

約数の個数: 16

約数和(自身を含む): 32270400

約数和(自身を除く): 11268514

約数列:

[1, 2, 53, 106, 239, 478, 829, 1658, 12667, 25334, 43937, 87874, 198131, 396262, 10500943, 21001886]

約数ペア:

[(1, 21001886), (2, 10500943), (53, 396262), (106, 198131), (239, 87874), (478, 43937), (829, 25334), (1658, 12667)]