128805440

素因数分解:

$2^6\times 5^1\times {\mathrm{402517}}^1$

素因数の和:402534

約数の個数: 28

約数和(自身を含む): 306718716

約数和(自身を除く): 177913276

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 402517, 805034, 1610068, 2012585, 3220136, 4025170, 6440272, 8050340, 12880544, 16100680, 25761088, 32201360, 64402720, 128805440]

約数ペア:

[(1, 128805440), (2, 64402720), (4, 32201360), (5, 25761088), (8, 16100680), (10, 12880544), (16, 8050340), (20, 6440272), (32, 4025170), (40, 3220136), (64, 2012585), (80, 1610068), (160, 805034), (320, 402517)]