21245180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{8779}}^1$

素因数の和:8810

約数の個数: 36

約数和(自身を含む): 49045080

約数和(自身を除く): 27799900

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 8779, 17558, 35116, 43895, 87790, 96569, 175580, 193138, 386276, 482845, 965690, 1062259, 1931380, 2124518, 4249036, 5311295, 10622590, 21245180]

約数ペア:

[(1, 21245180), (2, 10622590), (4, 5311295), (5, 4249036), (10, 2124518), (11, 1931380), (20, 1062259), (22, 965690), (44, 482845), (55, 386276), (110, 193138), (121, 175580), (220, 96569), (242, 87790), (484, 43895), (605, 35116), (1210, 17558), (2420, 8779)]