21780712

素因数分解:

$2^3\times {\mathrm{163}}^1\times {\mathrm{16703}}^1$

素因数の和:16872

約数の個数: 16

約数和(自身を含む): 41091840

約数和(自身を除く): 19311128

約数列:

[1, 2, 4, 8, 163, 326, 652, 1304, 16703, 33406, 66812, 133624, 2722589, 5445178, 10890356, 21780712]

約数ペア:

[(1, 21780712), (2, 10890356), (4, 5445178), (8, 2722589), (163, 133624), (326, 66812), (652, 33406), (1304, 16703)]