16503921

素因数分解:

$3^2\times 7^1\times {\mathrm{241}}^1\times {\mathrm{1087}}^1$

素因数の和:1341

約数の個数: 24

約数和(自身を含む): 27382784

約数和(自身を除く): 10878863

約数列:

[1, 3, 7, 9, 21, 63, 241, 723, 1087, 1687, 2169, 3261, 5061, 7609, 9783, 15183, 22827, 68481, 261967, 785901, 1833769, 2357703, 5501307, 16503921]

約数ペア:

[(1, 16503921), (3, 5501307), (7, 2357703), (9, 1833769), (21, 785901), (63, 261967), (241, 68481), (723, 22827), (1087, 15183), (1687, 9783), (2169, 7609), (3261, 5061)]