19780516

素因数分解:

$2^2\times 7^2\times {\mathrm{43}}^1\times {\mathrm{2347}}^1$

素因数の和:2408

約数の個数: 36

約数和(自身を含む): 41221488

約数和(自身を除く): 21440972

約数列:

[1, 2, 4, 7, 14, 28, 43, 49, 86, 98, 172, 196, 301, 602, 1204, 2107, 2347, 4214, 4694, 8428, 9388, 16429, 32858, 65716, 100921, 115003, 201842, 230006, 403684, 460012, 706447, 1412894, 2825788, 4945129, 9890258, 19780516]

約数ペア:

[(1, 19780516), (2, 9890258), (4, 4945129), (7, 2825788), (14, 1412894), (28, 706447), (43, 460012), (49, 403684), (86, 230006), (98, 201842), (172, 115003), (196, 100921), (301, 65716), (602, 32858), (1204, 16429), (2107, 9388), (2347, 8428), (4214, 4694)]