18700409

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{947}}^1$

素因数の和:1005

約数の個数: 24

約数和(自身を含む): 24208128

約数和(自身を除く): 5507719

約数列:

[1, 7, 13, 31, 49, 91, 217, 403, 637, 947, 1519, 2821, 6629, 12311, 19747, 29357, 46403, 86177, 205499, 381641, 603239, 1438493, 2671487, 18700409]

約数ペア:

[(1, 18700409), (7, 2671487), (13, 1438493), (31, 603239), (49, 381641), (91, 205499), (217, 86177), (403, 46403), (637, 29357), (947, 19747), (1519, 12311), (2821, 6629)]