2561643

素因数分解:

$3^2\times 7^1\times {\mathrm{73}}^1\times {\mathrm{557}}^1$

素因数の和:643

約数の個数: 24

約数和(自身を含む): 4294368

約数和(自身を除く): 1732725

約数列:

[1, 3, 7, 9, 21, 63, 73, 219, 511, 557, 657, 1533, 1671, 3899, 4599, 5013, 11697, 35091, 40661, 121983, 284627, 365949, 853881, 2561643]

約数ペア:

[(1, 2561643), (3, 853881), (7, 365949), (9, 284627), (21, 121983), (63, 40661), (73, 35091), (219, 11697), (511, 5013), (557, 4599), (657, 3899), (1533, 1671)]