21399376

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{32621}}^1$

素因数の和:32670

約数の個数: 20

約数和(自身を含む): 42473844

約数和(自身を除く): 21074468

約数列:

[1, 2, 4, 8, 16, 41, 82, 164, 328, 656, 32621, 65242, 130484, 260968, 521936, 1337461, 2674922, 5349844, 10699688, 21399376]

約数ペア:

[(1, 21399376), (2, 10699688), (4, 5349844), (8, 2674922), (16, 1337461), (41, 521936), (82, 260968), (164, 130484), (328, 65242), (656, 32621)]