399812

素因数分解:

$2^2\times 7^1\times {\mathrm{109}}^1\times {\mathrm{131}}^1$

素因数の和:251

約数の個数: 24

約数和(自身を含む): 813120

約数和(自身を除く): 413308

約数列:

[1, 2, 4, 7, 14, 28, 109, 131, 218, 262, 436, 524, 763, 917, 1526, 1834, 3052, 3668, 14279, 28558, 57116, 99953, 199906, 399812]

約数ペア:

[(1, 399812), (2, 199906), (4, 99953), (7, 57116), (14, 28558), (28, 14279), (109, 3668), (131, 3052), (218, 1834), (262, 1526), (436, 917), (524, 763)]