18971953

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{1723}}^1$

素因数の和:1765

約数の個数: 24

約数和(自身を含む): 25680704

約数和(自身を除く): 6708751

約数列:

[1, 7, 11, 13, 77, 91, 121, 143, 847, 1001, 1573, 1723, 11011, 12061, 18953, 22399, 132671, 156793, 208483, 246389, 1459381, 1724723, 2710279, 18971953]

約数ペア:

[(1, 18971953), (7, 2710279), (11, 1724723), (13, 1459381), (77, 246389), (91, 208483), (121, 156793), (143, 132671), (847, 22399), (1001, 18953), (1573, 12061), (1723, 11011)]