2780980

素因数分解:

$2^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{659}}^1$

素因数の和:879

約数の個数: 24

約数和(自身を含む): 5876640

約数和(自身を除く): 3095660

約数列:

[1, 2, 4, 5, 10, 20, 211, 422, 659, 844, 1055, 1318, 2110, 2636, 3295, 4220, 6590, 13180, 139049, 278098, 556196, 695245, 1390490, 2780980]

約数ペア:

[(1, 2780980), (2, 1390490), (4, 695245), (5, 556196), (10, 278098), (20, 139049), (211, 13180), (422, 6590), (659, 4220), (844, 3295), (1055, 2636), (1318, 2110)]