21717808

素因数分解:

$2^4\times 7^1\times {\mathrm{211}}^1\times {\mathrm{919}}^1$

素因数の和:1145

約数の個数: 40

約数和(自身を含む): 48369920

約数和(自身を除く): 26652112

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 211, 422, 844, 919, 1477, 1688, 1838, 2954, 3376, 3676, 5908, 6433, 7352, 11816, 12866, 14704, 23632, 25732, 51464, 102928, 193909, 387818, 775636, 1357363, 1551272, 2714726, 3102544, 5429452, 10858904, 21717808]

約数ペア:

[(1, 21717808), (2, 10858904), (4, 5429452), (7, 3102544), (8, 2714726), (14, 1551272), (16, 1357363), (28, 775636), (56, 387818), (112, 193909), (211, 102928), (422, 51464), (844, 25732), (919, 23632), (1477, 14704), (1688, 12866), (1838, 11816), (2954, 7352), (3376, 6433), (3676, 5908)]