21657904

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{229}}^1\times {\mathrm{257}}^1$

素因数の和:517

約数の個数: 40

約数和(自身を含む): 44148960

約数和(自身を除く): 22491056

約数列:

[1, 2, 4, 8, 16, 23, 46, 92, 184, 229, 257, 368, 458, 514, 916, 1028, 1832, 2056, 3664, 4112, 5267, 5911, 10534, 11822, 21068, 23644, 42136, 47288, 58853, 84272, 94576, 117706, 235412, 470824, 941648, 1353619, 2707238, 5414476, 10828952, 21657904]

約数ペア:

[(1, 21657904), (2, 10828952), (4, 5414476), (8, 2707238), (16, 1353619), (23, 941648), (46, 470824), (92, 235412), (184, 117706), (229, 94576), (257, 84272), (368, 58853), (458, 47288), (514, 42136), (916, 23644), (1028, 21068), (1832, 11822), (2056, 10534), (3664, 5911), (4112, 5267)]