19721793

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{5557}}^1$

素因数の和:5593

約数の個数: 24

約数和(自身を含む): 32547648

約数和(自身を除く): 12825855

約数列:

[1, 3, 7, 13, 21, 39, 91, 169, 273, 507, 1183, 3549, 5557, 16671, 38899, 72241, 116697, 216723, 505687, 939133, 1517061, 2817399, 6573931, 19721793]

約数ペア:

[(1, 19721793), (3, 6573931), (7, 2817399), (13, 1517061), (21, 939133), (39, 505687), (91, 216723), (169, 116697), (273, 72241), (507, 38899), (1183, 16671), (3549, 5557)]