21388144

素因数分解:

$2^4\times {\mathrm{79}}^1\times {\mathrm{16921}}^1$

素因数の和:17008

約数の個数: 20

約数和(自身を含む): 41966560

約数和(自身を除く): 20578416

約数列:

[1, 2, 4, 8, 16, 79, 158, 316, 632, 1264, 16921, 33842, 67684, 135368, 270736, 1336759, 2673518, 5347036, 10694072, 21388144]

約数ペア:

[(1, 21388144), (2, 10694072), (4, 5347036), (8, 2673518), (16, 1336759), (79, 270736), (158, 135368), (316, 67684), (632, 33842), (1264, 16921)]