128978829

素因数分解:

$3^2\times 7^2\times {\mathrm{292469}}^1$

素因数の和:292489

約数の個数: 18

約数和(自身を含む): 216720270

約数和(自身を除く): 87741441

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 292469, 877407, 2047283, 2632221, 6141849, 14330981, 18425547, 42992943, 128978829]

約数ペア:

[(1, 128978829), (3, 42992943), (7, 18425547), (9, 14330981), (21, 6141849), (49, 2632221), (63, 2047283), (147, 877407), (441, 292469)]