21235991

素因数分解:

$7^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{1213}}^1$

素因数の和:1322

約数の個数: 16

約数和(自身を含む): 25290048

約数和(自身を除く): 4054057

約数列:

[1, 7, 41, 61, 287, 427, 1213, 2501, 8491, 17507, 49733, 73993, 348131, 517951, 3033713, 21235991]

約数ペア:

[(1, 21235991), (7, 3033713), (41, 517951), (61, 348131), (287, 73993), (427, 49733), (1213, 17507), (2501, 8491)]