20781616

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{76403}}^1$

素因数の和:76428

約数の個数: 20

約数和(自身を含む): 42633432

約数和(自身を除く): 21851816

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 76403, 152806, 305612, 611224, 1222448, 1298851, 2597702, 5195404, 10390808, 20781616]

約数ペア:

[(1, 20781616), (2, 10390808), (4, 5195404), (8, 2597702), (16, 1298851), (17, 1222448), (34, 611224), (68, 305612), (136, 152806), (272, 76403)]