20780290

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{251}}^1\times {\mathrm{487}}^1$

素因数の和:762

約数の個数: 32

約数和(自身を含む): 39844224

約数和(自身を除く): 19063934

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 251, 487, 502, 974, 1255, 2435, 2510, 4267, 4870, 8279, 8534, 16558, 21335, 41395, 42670, 82790, 122237, 244474, 611185, 1222370, 2078029, 4156058, 10390145, 20780290]

約数ペア:

[(1, 20780290), (2, 10390145), (5, 4156058), (10, 2078029), (17, 1222370), (34, 611185), (85, 244474), (170, 122237), (251, 82790), (487, 42670), (502, 41395), (974, 21335), (1255, 16558), (2435, 8534), (2510, 8279), (4267, 4870)]