20548820

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{499}}^1$

素因数の和:608

約数の個数: 48

約数和(自身を含む): 45360000

約数和(自身を除く): 24811180

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 71, 116, 142, 145, 284, 290, 355, 499, 580, 710, 998, 1420, 1996, 2059, 2495, 4118, 4990, 8236, 9980, 10295, 14471, 20590, 28942, 35429, 41180, 57884, 70858, 72355, 141716, 144710, 177145, 289420, 354290, 708580, 1027441, 2054882, 4109764, 5137205, 10274410, 20548820]

約数ペア:

[(1, 20548820), (2, 10274410), (4, 5137205), (5, 4109764), (10, 2054882), (20, 1027441), (29, 708580), (58, 354290), (71, 289420), (116, 177145), (142, 144710), (145, 141716), (284, 72355), (290, 70858), (355, 57884), (499, 41180), (580, 35429), (710, 28942), (998, 20590), (1420, 14471), (1996, 10295), (2059, 9980), (2495, 8236), (4118, 4990)]