21221431

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{197}}^1\times {\mathrm{1399}}^1$

素因数の和:1614

約数の個数: 16

約数和(自身を含む): 26611200

約数和(自身を除く): 5389769

約数列:

[1, 7, 11, 77, 197, 1379, 1399, 2167, 9793, 15169, 15389, 107723, 275603, 1929221, 3031633, 21221431]

約数ペア:

[(1, 21221431), (7, 3031633), (11, 1929221), (77, 275603), (197, 107723), (1379, 15389), (1399, 15169), (2167, 9793)]