19970170

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{2557}}^1$

素因数の和:2646

約数の個数: 32

約数和(自身を含む): 39782016

約数和(自身を除く): 19811846

約数列:

[1, 2, 5, 10, 11, 22, 55, 71, 110, 142, 355, 710, 781, 1562, 2557, 3905, 5114, 7810, 12785, 25570, 28127, 56254, 140635, 181547, 281270, 363094, 907735, 1815470, 1997017, 3994034, 9985085, 19970170]

約数ペア:

[(1, 19970170), (2, 9985085), (5, 3994034), (10, 1997017), (11, 1815470), (22, 907735), (55, 363094), (71, 281270), (110, 181547), (142, 140635), (355, 56254), (710, 28127), (781, 25570), (1562, 12785), (2557, 7810), (3905, 5114)]