19954564

素因数分解:

$2^2\times 7^2\times {\mathrm{61}}^1\times {\mathrm{1669}}^1$

素因数の和:1748

約数の個数: 36

約数和(自身を含む): 41312460

約数和(自身を除く): 21357896

約数列:

[1, 2, 4, 7, 14, 28, 49, 61, 98, 122, 196, 244, 427, 854, 1669, 1708, 2989, 3338, 5978, 6676, 11683, 11956, 23366, 46732, 81781, 101809, 163562, 203618, 327124, 407236, 712663, 1425326, 2850652, 4988641, 9977282, 19954564]

約数ペア:

[(1, 19954564), (2, 9977282), (4, 4988641), (7, 2850652), (14, 1425326), (28, 712663), (49, 407236), (61, 327124), (98, 203618), (122, 163562), (196, 101809), (244, 81781), (427, 46732), (854, 23366), (1669, 11956), (1708, 11683), (2989, 6676), (3338, 5978)]