18781371

素因数分解:

$3^2\times 7^1\times {\mathrm{241}}^1\times {\mathrm{1237}}^1$

素因数の和:1491

約数の個数: 24

約数和(自身を含む): 31157984

約数和(自身を除く): 12376613

約数列:

[1, 3, 7, 9, 21, 63, 241, 723, 1237, 1687, 2169, 3711, 5061, 8659, 11133, 15183, 25977, 77931, 298117, 894351, 2086819, 2683053, 6260457, 18781371]

約数ペア:

[(1, 18781371), (3, 6260457), (7, 2683053), (9, 2086819), (21, 894351), (63, 298117), (241, 77931), (723, 25977), (1237, 15183), (1687, 11133), (2169, 8659), (3711, 5061)]