21040708

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:268

約数の個数: 48

約数和(自身を含む): 41489280

約数和(自身を除く): 20448572

約数列:

[1, 2, 4, 13, 26, 41, 52, 71, 82, 139, 142, 164, 278, 284, 533, 556, 923, 1066, 1807, 1846, 2132, 2911, 3614, 3692, 5699, 5822, 7228, 9869, 11398, 11644, 19738, 22796, 37843, 39476, 74087, 75686, 128297, 148174, 151372, 256594, 296348, 404629, 513188, 809258, 1618516, 5260177, 10520354, 21040708]

約数ペア:

[(1, 21040708), (2, 10520354), (4, 5260177), (13, 1618516), (26, 809258), (41, 513188), (52, 404629), (71, 296348), (82, 256594), (139, 151372), (142, 148174), (164, 128297), (278, 75686), (284, 74087), (533, 39476), (556, 37843), (923, 22796), (1066, 19738), (1807, 11644), (1846, 11398), (2132, 9869), (2911, 7228), (3614, 5822), (3692, 5699)]