20984948

素因数分解:

$2^2\times {\mathrm{41}}^1\times {\mathrm{199}}^1\times {\mathrm{643}}^1$

素因数の和:887

約数の個数: 24

約数和(自身を含む): 37867200

約数和(自身を除く): 16882252

約数列:

[1, 2, 4, 41, 82, 164, 199, 398, 643, 796, 1286, 2572, 8159, 16318, 26363, 32636, 52726, 105452, 127957, 255914, 511828, 5246237, 10492474, 20984948]

約数ペア:

[(1, 20984948), (2, 10492474), (4, 5246237), (41, 511828), (82, 255914), (164, 127957), (199, 105452), (398, 52726), (643, 32636), (796, 26363), (1286, 16318), (2572, 8159)]