18780778

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{6961}}^1$

素因数の和:7053

約数の個数: 16

約数和(自身を含む): 30075840

約数和(自身を除く): 11295062

約数列:

[1, 2, 19, 38, 71, 142, 1349, 2698, 6961, 13922, 132259, 264518, 494231, 988462, 9390389, 18780778]

約数ペア:

[(1, 18780778), (2, 9390389), (19, 988462), (38, 494231), (71, 264518), (142, 132259), (1349, 13922), (2698, 6961)]