261886989

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{773}}^1$

素因数の和:886

約数の個数: 64

約数和(自身を含む): 461873664

約数和(自身を除く): 199986675

約数列:

[1, 3, 7, 13, 17, 21, 39, 51, 73, 91, 119, 219, 221, 273, 357, 511, 663, 773, 949, 1241, 1533, 1547, 2319, 2847, 3723, 4641, 5411, 6643, 8687, 10049, 13141, 16133, 16233, 19929, 26061, 30147, 39423, 48399, 56429, 70343, 91987, 112931, 169287, 170833, 211029, 275961, 338793, 395003, 512499, 733577, 959293, 1185009, 1195831, 2200731, 2877879, 3587493, 5135039, 6715051, 12470809, 15405117, 20145153, 37412427, 87295663, 261886989]

約数ペア:

[(1, 261886989), (3, 87295663), (7, 37412427), (13, 20145153), (17, 15405117), (21, 12470809), (39, 6715051), (51, 5135039), (73, 3587493), (91, 2877879), (119, 2200731), (219, 1195831), (221, 1185009), (273, 959293), (357, 733577), (511, 512499), (663, 395003), (773, 338793), (949, 275961), (1241, 211029), (1533, 170833), (1547, 169287), (2319, 112931), (2847, 91987), (3723, 70343), (4641, 56429), (5411, 48399), (6643, 39423), (8687, 30147), (10049, 26061), (13141, 19929), (16133, 16233)]