20987862

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{499711}}^1$

素因数の和:499723

約数の個数: 16

約数和(自身を含む): 47972352

約数和(自身を除く): 26984490

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 499711, 999422, 1499133, 2998266, 3497977, 6995954, 10493931, 20987862]

約数ペア:

[(1, 20987862), (2, 10493931), (3, 6995954), (6, 3497977), (7, 2998266), (14, 1499133), (21, 999422), (42, 499711)]