21271684

素因数分解:

$2^2\times 7^2\times {\mathrm{108529}}^1$

素因数の和:108547

約数の個数: 18

約数和(自身を含む): 43303470

約数和(自身を除く): 22031786

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 108529, 217058, 434116, 759703, 1519406, 3038812, 5317921, 10635842, 21271684]

約数ペア:

[(1, 21271684), (2, 10635842), (4, 5317921), (7, 3038812), (14, 1519406), (28, 759703), (49, 434116), (98, 217058), (196, 108529)]