20122820

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{383}}^1$

素因数の和:500

約数の個数: 48

約数和(自身を含む): 44126208

約数和(自身を除く): 24003388

約数列:

[1, 2, 4, 5, 10, 20, 37, 71, 74, 142, 148, 185, 284, 355, 370, 383, 710, 740, 766, 1420, 1532, 1915, 2627, 3830, 5254, 7660, 10508, 13135, 14171, 26270, 27193, 28342, 52540, 54386, 56684, 70855, 108772, 135965, 141710, 271930, 283420, 543860, 1006141, 2012282, 4024564, 5030705, 10061410, 20122820]

約数ペア:

[(1, 20122820), (2, 10061410), (4, 5030705), (5, 4024564), (10, 2012282), (20, 1006141), (37, 543860), (71, 283420), (74, 271930), (142, 141710), (148, 135965), (185, 108772), (284, 70855), (355, 56684), (370, 54386), (383, 52540), (710, 28342), (740, 27193), (766, 26270), (1420, 14171), (1532, 13135), (1915, 10508), (2627, 7660), (3830, 5254)]