21143540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{8737}}^1$

素因数の和:8768

約数の個数: 36

約数和(自身を含む): 48810468

約数和(自身を除く): 27666928

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 8737, 17474, 34948, 43685, 87370, 96107, 174740, 192214, 384428, 480535, 961070, 1057177, 1922140, 2114354, 4228708, 5285885, 10571770, 21143540]

約数ペア:

[(1, 21143540), (2, 10571770), (4, 5285885), (5, 4228708), (10, 2114354), (11, 1922140), (20, 1057177), (22, 961070), (44, 480535), (55, 384428), (110, 192214), (121, 174740), (220, 96107), (242, 87370), (484, 43685), (605, 34948), (1210, 17474), (2420, 8737)]