18861980

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{6007}}^1$

素因数の和:6173

約数の個数: 24

約数和(自身を含む): 39869088

約数和(自身を除く): 21007108

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 6007, 12014, 24028, 30035, 60070, 120140, 943099, 1886198, 3772396, 4715495, 9430990, 18861980]

約数ペア:

[(1, 18861980), (2, 9430990), (4, 4715495), (5, 3772396), (10, 1886198), (20, 943099), (157, 120140), (314, 60070), (628, 30035), (785, 24028), (1570, 12014), (3140, 6007)]