128842820

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{207811}}^1$

素因数の和:207851

約数の個数: 24

約数和(自身を含む): 279299328

約数和(自身を除く): 150456508

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 207811, 415622, 831244, 1039055, 2078110, 4156220, 6442141, 12884282, 25768564, 32210705, 64421410, 128842820]

約数ペア:

[(1, 128842820), (2, 64421410), (4, 32210705), (5, 25768564), (10, 12884282), (20, 6442141), (31, 4156220), (62, 2078110), (124, 1039055), (155, 831244), (310, 415622), (620, 207811)]