20001664

素因数分解:

$2^7\times {\mathrm{307}}^1\times {\mathrm{509}}^1$

素因数の和:830

約数の個数: 32

約数和(自身を含む): 40055400

約数和(自身を除く): 20053736

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 307, 509, 614, 1018, 1228, 2036, 2456, 4072, 4912, 8144, 9824, 16288, 19648, 32576, 39296, 65152, 156263, 312526, 625052, 1250104, 2500208, 5000416, 10000832, 20001664]

約数ペア:

[(1, 20001664), (2, 10000832), (4, 5000416), (8, 2500208), (16, 1250104), (32, 625052), (64, 312526), (128, 156263), (307, 65152), (509, 39296), (614, 32576), (1018, 19648), (1228, 16288), (2036, 9824), (2456, 8144), (4072, 4912)]