20877620

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1\times {\mathrm{317}}^1$

素因数の和:452

約数の個数: 48

約数和(自身を含む): 45677520

約数和(自身を除く): 24799900

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 89, 148, 178, 185, 317, 356, 370, 445, 634, 740, 890, 1268, 1585, 1780, 3170, 3293, 6340, 6586, 11729, 13172, 16465, 23458, 28213, 32930, 46916, 56426, 58645, 65860, 112852, 117290, 141065, 234580, 282130, 564260, 1043881, 2087762, 4175524, 5219405, 10438810, 20877620]

約数ペア:

[(1, 20877620), (2, 10438810), (4, 5219405), (5, 4175524), (10, 2087762), (20, 1043881), (37, 564260), (74, 282130), (89, 234580), (148, 141065), (178, 117290), (185, 112852), (317, 65860), (356, 58645), (370, 56426), (445, 46916), (634, 32930), (740, 28213), (890, 23458), (1268, 16465), (1585, 13172), (1780, 11729), (3170, 6586), (3293, 6340)]