19899908

素因数分解:

$2^2\times 7^1\times {\mathrm{61}}^2\times {\mathrm{191}}^1$

素因数の和:324

約数の個数: 36

約数和(自身を含む): 40674816

約数和(自身を除く): 20774908

約数列:

[1, 2, 4, 7, 14, 28, 61, 122, 191, 244, 382, 427, 764, 854, 1337, 1708, 2674, 3721, 5348, 7442, 11651, 14884, 23302, 26047, 46604, 52094, 81557, 104188, 163114, 326228, 710711, 1421422, 2842844, 4974977, 9949954, 19899908]

約数ペア:

[(1, 19899908), (2, 9949954), (4, 4974977), (7, 2842844), (14, 1421422), (28, 710711), (61, 326228), (122, 163114), (191, 104188), (244, 81557), (382, 52094), (427, 46604), (764, 26047), (854, 23302), (1337, 14884), (1708, 11651), (2674, 7442), (3721, 5348)]