9987964

素因数分解:

$2^2\times 7^2\times {\mathrm{131}}^1\times {\mathrm{389}}^1$

素因数の和:538

約数の個数: 36

約数和(自身を含む): 20540520

約数和(自身を除く): 10552556

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 131, 196, 262, 389, 524, 778, 917, 1556, 1834, 2723, 3668, 5446, 6419, 10892, 12838, 19061, 25676, 38122, 50959, 76244, 101918, 203836, 356713, 713426, 1426852, 2496991, 4993982, 9987964]

約数ペア:

[(1, 9987964), (2, 4993982), (4, 2496991), (7, 1426852), (14, 713426), (28, 356713), (49, 203836), (98, 101918), (131, 76244), (196, 50959), (262, 38122), (389, 25676), (524, 19061), (778, 12838), (917, 10892), (1556, 6419), (1834, 5446), (2723, 3668)]