21428825

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{2687}}^1$

素因数の和:2737

約数の個数: 24

約数和(自身を含む): 29998080

約数和(自身を除く): 8569255

約数列:

[1, 5, 11, 25, 29, 55, 145, 275, 319, 725, 1595, 2687, 7975, 13435, 29557, 67175, 77923, 147785, 389615, 738925, 857153, 1948075, 4285765, 21428825]

約数ペア:

[(1, 21428825), (5, 4285765), (11, 1948075), (25, 857153), (29, 738925), (55, 389615), (145, 147785), (275, 77923), (319, 67175), (725, 29557), (1595, 13435), (2687, 7975)]