21780278

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{7829}}^1$

素因数の和:7951

約数の個数: 16

約数和(自身を含む): 35516880

約数和(自身を除く): 13736602

約数列:

[1, 2, 13, 26, 107, 214, 1391, 2782, 7829, 15658, 101777, 203554, 837703, 1675406, 10890139, 21780278]

約数ペア:

[(1, 21780278), (2, 10890139), (13, 1675406), (26, 837703), (107, 203554), (214, 101777), (1391, 15658), (2782, 7829)]