21006416

素因数分解:

$2^4\times {\mathrm{79}}^1\times {\mathrm{16619}}^1$

素因数の和:16706

約数の個数: 20

約数和(自身を含む): 41217600

約数和(自身を除く): 20211184

約数列:

[1, 2, 4, 8, 16, 79, 158, 316, 632, 1264, 16619, 33238, 66476, 132952, 265904, 1312901, 2625802, 5251604, 10503208, 21006416]

約数ペア:

[(1, 21006416), (2, 10503208), (4, 5251604), (8, 2625802), (16, 1312901), (79, 265904), (158, 132952), (316, 66476), (632, 33238), (1264, 16619)]