257223640

素因数分解:

$2^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{77477}}^1$

素因数の和:77571

約数の個数: 32

約数和(自身を含む): 585733680

約数和(自身を除く): 328510040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 83, 166, 332, 415, 664, 830, 1660, 3320, 77477, 154954, 309908, 387385, 619816, 774770, 1549540, 3099080, 6430591, 12861182, 25722364, 32152955, 51444728, 64305910, 128611820, 257223640]

約数ペア:

[(1, 257223640), (2, 128611820), (4, 64305910), (5, 51444728), (8, 32152955), (10, 25722364), (20, 12861182), (40, 6430591), (83, 3099080), (166, 1549540), (332, 774770), (415, 619816), (664, 387385), (830, 309908), (1660, 154954), (3320, 77477)]