20905521

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{1049}}^1$

素因数の和:1145

約数の個数: 32

約数和(自身を含む): 34809600

約数和(自身を除く): 13904079

約数列:

[1, 3, 7, 13, 21, 39, 73, 91, 219, 273, 511, 949, 1049, 1533, 2847, 3147, 6643, 7343, 13637, 19929, 22029, 40911, 76577, 95459, 229731, 286377, 536039, 995501, 1608117, 2986503, 6968507, 20905521]

約数ペア:

[(1, 20905521), (3, 6968507), (7, 2986503), (13, 1608117), (21, 995501), (39, 536039), (73, 286377), (91, 229731), (219, 95459), (273, 76577), (511, 40911), (949, 22029), (1049, 19929), (1533, 13637), (2847, 7343), (3147, 6643)]