21157548

素因数分解:

$2^2\times 3^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1\times {\mathrm{313}}^1$

素因数の和:494

約数の個数: 48

約数和(自身を含む): 51063936

約数和(自身を除く): 29906388

約数列:

[1, 2, 3, 4, 6, 12, 43, 86, 129, 131, 172, 258, 262, 313, 393, 516, 524, 626, 786, 939, 1252, 1572, 1878, 3756, 5633, 11266, 13459, 16899, 22532, 26918, 33798, 40377, 41003, 53836, 67596, 80754, 82006, 123009, 161508, 164012, 246018, 492036, 1763129, 3526258, 5289387, 7052516, 10578774, 21157548]

約数ペア:

[(1, 21157548), (2, 10578774), (3, 7052516), (4, 5289387), (6, 3526258), (12, 1763129), (43, 492036), (86, 246018), (129, 164012), (131, 161508), (172, 123009), (258, 82006), (262, 80754), (313, 67596), (393, 53836), (516, 41003), (524, 40377), (626, 33798), (786, 26918), (939, 22532), (1252, 16899), (1572, 13459), (1878, 11266), (3756, 5633)]