12705920

素因数分解:

$2^7\times 5^1\times {\mathrm{19853}}^1$

素因数の和:19872

約数の個数: 32

約数和(自身を含む): 30376620

約数和(自身を除く): 17670700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 19853, 39706, 79412, 99265, 158824, 198530, 317648, 397060, 635296, 794120, 1270592, 1588240, 2541184, 3176480, 6352960, 12705920]

約数ペア:

[(1, 12705920), (2, 6352960), (4, 3176480), (5, 2541184), (8, 1588240), (10, 1270592), (16, 794120), (20, 635296), (32, 397060), (40, 317648), (64, 198530), (80, 158824), (128, 99265), (160, 79412), (320, 39706), (640, 19853)]