21120892

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{406171}}^1$

素因数の和:406188

約数の個数: 12

約数和(自身を含む): 39804856

約数和(自身を除く): 18683964

約数列:

[1, 2, 4, 13, 26, 52, 406171, 812342, 1624684, 5280223, 10560446, 21120892]

約数ペア:

[(1, 21120892), (2, 10560446), (4, 5280223), (13, 1624684), (26, 812342), (52, 406171)]