278458510

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^3\times {\mathrm{20921}}^1$

素因数の和:20961

約数の個数: 32

約数和(自身を含む): 551336544

約数和(自身を除く): 272878034

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 121, 242, 605, 1210, 1331, 2662, 6655, 13310, 20921, 41842, 104605, 209210, 230131, 460262, 1150655, 2301310, 2531441, 5062882, 12657205, 25314410, 27845851, 55691702, 139229255, 278458510]

約数ペア:

[(1, 278458510), (2, 139229255), (5, 55691702), (10, 27845851), (11, 25314410), (22, 12657205), (55, 5062882), (110, 2531441), (121, 2301310), (242, 1150655), (605, 460262), (1210, 230131), (1331, 209210), (2662, 104605), (6655, 41842), (13310, 20921)]