20544560

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3617}}^1$

素因数の和:3701

約数の個数: 40

約数和(自身を含む): 48452256

約数和(自身を除く): 27907696

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 3617, 5680, 7234, 14468, 18085, 28936, 36170, 57872, 72340, 144680, 256807, 289360, 513614, 1027228, 1284035, 2054456, 2568070, 4108912, 5136140, 10272280, 20544560]

約数ペア:

[(1, 20544560), (2, 10272280), (4, 5136140), (5, 4108912), (8, 2568070), (10, 2054456), (16, 1284035), (20, 1027228), (40, 513614), (71, 289360), (80, 256807), (142, 144680), (284, 72340), (355, 57872), (568, 36170), (710, 28936), (1136, 18085), (1420, 14468), (2840, 7234), (3617, 5680)]