28505180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{11779}}^1$

素因数の和:11810

約数の個数: 36

約数和(自身を含む): 65803080

約数和(自身を除く): 37297900

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 11779, 23558, 47116, 58895, 117790, 129569, 235580, 259138, 518276, 647845, 1295690, 1425259, 2591380, 2850518, 5701036, 7126295, 14252590, 28505180]

約数ペア:

[(1, 28505180), (2, 14252590), (4, 7126295), (5, 5701036), (10, 2850518), (11, 2591380), (20, 1425259), (22, 1295690), (44, 647845), (55, 518276), (110, 259138), (121, 235580), (220, 129569), (242, 117790), (484, 58895), (605, 47116), (1210, 23558), (2420, 11779)]