128578328

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{499}}^1\times {\mathrm{1039}}^1$

素因数の和:1575

約数の個数: 32

約数和(自身を含む): 249600000

約数和(自身を除く): 121021672

約数列:

[1, 2, 4, 8, 31, 62, 124, 248, 499, 998, 1039, 1996, 2078, 3992, 4156, 8312, 15469, 30938, 32209, 61876, 64418, 123752, 128836, 257672, 518461, 1036922, 2073844, 4147688, 16072291, 32144582, 64289164, 128578328]

約数ペア:

[(1, 128578328), (2, 64289164), (4, 32144582), (8, 16072291), (31, 4147688), (62, 2073844), (124, 1036922), (248, 518461), (499, 257672), (998, 128836), (1039, 123752), (1996, 64418), (2078, 61876), (3992, 32209), (4156, 30938), (8312, 15469)]