21458828

素因数分解:

$2^2\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{977}}^1$

素因数の和:1034

約数の個数: 36

約数和(自身を含む): 42034440

約数和(自身を除く): 20575612

約数列:

[1, 2, 4, 17, 19, 34, 38, 68, 76, 289, 323, 578, 646, 977, 1156, 1292, 1954, 3908, 5491, 10982, 16609, 18563, 21964, 33218, 37126, 66436, 74252, 282353, 315571, 564706, 631142, 1129412, 1262284, 5364707, 10729414, 21458828]

約数ペア:

[(1, 21458828), (2, 10729414), (4, 5364707), (17, 1262284), (19, 1129412), (34, 631142), (38, 564706), (68, 315571), (76, 282353), (289, 74252), (323, 66436), (578, 37126), (646, 33218), (977, 21964), (1156, 18563), (1292, 16609), (1954, 10982), (3908, 5491)]