639202557

素因数分解:

$3^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{239671}}^1$

素因数の和:239808

約数の個数: 16

約数和(自身を含む): 981696512

約数和(自身を除く): 342493955

約数列:

[1, 3, 7, 21, 127, 381, 889, 2667, 239671, 719013, 1677697, 5033091, 30438217, 91314651, 213067519, 639202557]

約数ペア:

[(1, 639202557), (3, 213067519), (7, 91314651), (21, 30438217), (127, 5033091), (381, 1677697), (889, 719013), (2667, 239671)]