645248

素因数分解:

$2^7\times {\mathrm{71}}^2$

素因数の和:156

約数の個数: 24

約数和(自身を含む): 1303815

約数和(自身を除く): 658567

約数列:

[1, 2, 4, 8, 16, 32, 64, 71, 128, 142, 284, 568, 1136, 2272, 4544, 5041, 9088, 10082, 20164, 40328, 80656, 161312, 322624, 645248]

約数ペア:

[(1, 645248), (2, 322624), (4, 161312), (8, 80656), (16, 40328), (32, 20164), (64, 10082), (71, 9088), (128, 5041), (142, 4544), (284, 2272), (568, 1136)]