390440

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{227}}^1$

素因数の和:281

約数の個数: 32

約数和(自身を含む): 902880

約数和(自身を除く): 512440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 227, 344, 430, 454, 860, 908, 1135, 1720, 1816, 2270, 4540, 9080, 9761, 19522, 39044, 48805, 78088, 97610, 195220, 390440]

約数ペア:

[(1, 390440), (2, 195220), (4, 97610), (5, 78088), (8, 48805), (10, 39044), (20, 19522), (40, 9761), (43, 9080), (86, 4540), (172, 2270), (215, 1816), (227, 1720), (344, 1135), (430, 908), (454, 860)]