20945847

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{1229}}^1$

素因数の和:1287

約数の個数: 32

約数和(自身を含む): 33062400

約数和(自身を除く): 12116553

約数列:

[1, 3, 13, 19, 23, 39, 57, 69, 247, 299, 437, 741, 897, 1229, 1311, 3687, 5681, 15977, 17043, 23351, 28267, 47931, 70053, 84801, 303563, 367471, 537073, 910689, 1102413, 1611219, 6981949, 20945847]

約数ペア:

[(1, 20945847), (3, 6981949), (13, 1611219), (19, 1102413), (23, 910689), (39, 537073), (57, 367471), (69, 303563), (247, 84801), (299, 70053), (437, 47931), (741, 28267), (897, 23351), (1229, 17043), (1311, 15977), (3687, 5681)]