20123990

素因数分解:

$2^1\times 5^1\times {\mathrm{47}}^2\times {\mathrm{911}}^1$

素因数の和:1012

約数の個数: 24

約数和(自身を含む): 37050912

約数和(自身を除く): 16926922

約数列:

[1, 2, 5, 10, 47, 94, 235, 470, 911, 1822, 2209, 4418, 4555, 9110, 11045, 22090, 42817, 85634, 214085, 428170, 2012399, 4024798, 10061995, 20123990]

約数ペア:

[(1, 20123990), (2, 10061995), (5, 4024798), (10, 2012399), (47, 428170), (94, 214085), (235, 85634), (470, 42817), (911, 22090), (1822, 11045), (2209, 9110), (4418, 4555)]