21780346

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{2213}}^1$

素因数の和:2278

約数の個数: 32

約数和(自身を含む): 40383360

約数和(自身を除く): 18603014

約数列:

[1, 2, 7, 14, 19, 37, 38, 74, 133, 259, 266, 518, 703, 1406, 2213, 4426, 4921, 9842, 15491, 30982, 42047, 81881, 84094, 163762, 294329, 573167, 588658, 1146334, 1555739, 3111478, 10890173, 21780346]

約数ペア:

[(1, 21780346), (2, 10890173), (7, 3111478), (14, 1555739), (19, 1146334), (37, 588658), (38, 573167), (74, 294329), (133, 163762), (259, 84094), (266, 81881), (518, 42047), (703, 30982), (1406, 15491), (2213, 9842), (4426, 4921)]