19996664

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{293}}^1\times {\mathrm{449}}^1$

素因数の和:767

約数の個数: 32

約数和(自身を含む): 39690000

約数和(自身を除く): 19693336

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 293, 449, 586, 898, 1172, 1796, 2344, 3592, 5567, 8531, 11134, 17062, 22268, 34124, 44536, 68248, 131557, 263114, 526228, 1052456, 2499583, 4999166, 9998332, 19996664]

約数ペア:

[(1, 19996664), (2, 9998332), (4, 4999166), (8, 2499583), (19, 1052456), (38, 526228), (76, 263114), (152, 131557), (293, 68248), (449, 44536), (586, 34124), (898, 22268), (1172, 17062), (1796, 11134), (2344, 8531), (3592, 5567)]