21958240

素因数分解:

$2^5\times 5^1\times {\mathrm{137239}}^1$

素因数の和:137254

約数の個数: 24

約数和(自身を含む): 51876720

約数和(自身を除く): 29918480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 137239, 274478, 548956, 686195, 1097912, 1372390, 2195824, 2744780, 4391648, 5489560, 10979120, 21958240]

約数ペア:

[(1, 21958240), (2, 10979120), (4, 5489560), (5, 4391648), (8, 2744780), (10, 2195824), (16, 1372390), (20, 1097912), (32, 686195), (40, 548956), (80, 274478), (160, 137239)]