21499786

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{139609}}^1$

素因数の和:139629

約数の個数: 16

約数和(自身を含む): 40207680

約数和(自身を除く): 18707894

約数列:

[1, 2, 7, 11, 14, 22, 77, 154, 139609, 279218, 977263, 1535699, 1954526, 3071398, 10749893, 21499786]

約数ペア:

[(1, 21499786), (2, 10749893), (7, 3071398), (11, 1954526), (14, 1535699), (22, 977263), (77, 279218), (154, 139609)]