18978986

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{373}}^1$

素因数の和:510

約数の個数: 32

約数和(自身を含む): 32672640

約数和(自身を除く): 13693654

約数列:

[1, 2, 13, 19, 26, 38, 103, 206, 247, 373, 494, 746, 1339, 1957, 2678, 3914, 4849, 7087, 9698, 14174, 25441, 38419, 50882, 76838, 92131, 184262, 499447, 729961, 998894, 1459922, 9489493, 18978986]

約数ペア:

[(1, 18978986), (2, 9489493), (13, 1459922), (19, 998894), (26, 729961), (38, 499447), (103, 184262), (206, 92131), (247, 76838), (373, 50882), (494, 38419), (746, 25441), (1339, 14174), (1957, 9698), (2678, 7087), (3914, 4849)]