20865920

素因数分解:

$2^7\times 5^1\times {\mathrm{32603}}^1$

素因数の和:32622

約数の個数: 32

約数和(自身を含む): 49884120

約数和(自身を除く): 29018200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 32603, 65206, 130412, 163015, 260824, 326030, 521648, 652060, 1043296, 1304120, 2086592, 2608240, 4173184, 5216480, 10432960, 20865920]

約数ペア:

[(1, 20865920), (2, 10432960), (4, 5216480), (5, 4173184), (8, 2608240), (10, 2086592), (16, 1304120), (20, 1043296), (32, 652060), (40, 521648), (64, 326030), (80, 260824), (128, 163015), (160, 130412), (320, 65206), (640, 32603)]