20389070

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^2\times {\mathrm{71}}^1$

素因数の和:185

約数の個数: 48

約数和(自身を含む): 40951008

約数和(自身を除く): 20561938

約数列:

[1, 2, 5, 10, 13, 26, 47, 65, 71, 94, 130, 142, 235, 355, 470, 611, 710, 923, 1222, 1846, 2209, 3055, 3337, 4418, 4615, 6110, 6674, 9230, 11045, 16685, 22090, 28717, 33370, 43381, 57434, 86762, 143585, 156839, 216905, 287170, 313678, 433810, 784195, 1568390, 2038907, 4077814, 10194535, 20389070]

約数ペア:

[(1, 20389070), (2, 10194535), (5, 4077814), (10, 2038907), (13, 1568390), (26, 784195), (47, 433810), (65, 313678), (71, 287170), (94, 216905), (130, 156839), (142, 143585), (235, 86762), (355, 57434), (470, 43381), (611, 33370), (710, 28717), (923, 22090), (1222, 16685), (1846, 11045), (2209, 9230), (3055, 6674), (3337, 6110), (4418, 4615)]