280700990

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{439}}^1\times {\mathrm{1487}}^1$

素因数の和:1976

約数の個数: 32

約数和(自身を含む): 518538240

約数和(自身を除く): 237837250

約数列:

[1, 2, 5, 10, 43, 86, 215, 430, 439, 878, 1487, 2195, 2974, 4390, 7435, 14870, 18877, 37754, 63941, 94385, 127882, 188770, 319705, 639410, 652793, 1305586, 3263965, 6527930, 28070099, 56140198, 140350495, 280700990]

約数ペア:

[(1, 280700990), (2, 140350495), (5, 56140198), (10, 28070099), (43, 6527930), (86, 3263965), (215, 1305586), (430, 652793), (439, 639410), (878, 319705), (1487, 188770), (2195, 127882), (2974, 94385), (4390, 63941), (7435, 37754), (14870, 18877)]