15978487

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{191}}^1$

素因数の和:271

約数の個数: 32

約数和(自身を含む): 21012480

約数和(自身を除く): 5033993

約数列:

[1, 7, 17, 19, 37, 119, 133, 191, 259, 323, 629, 703, 1337, 2261, 3247, 3629, 4403, 4921, 7067, 11951, 22729, 25403, 49469, 61693, 83657, 120139, 134273, 431851, 840973, 939911, 2282641, 15978487]

約数ペア:

[(1, 15978487), (7, 2282641), (17, 939911), (19, 840973), (37, 431851), (119, 134273), (133, 120139), (191, 83657), (259, 61693), (323, 49469), (629, 25403), (703, 22729), (1337, 11951), (2261, 7067), (3247, 4921), (3629, 4403)]