18521993

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{317}}^1\times {\mathrm{491}}^1$

素因数の和:832

約数の個数: 16

約数和(自身を含む): 22529664

約数和(自身を除く): 4007671

約数列:

[1, 7, 17, 119, 317, 491, 2219, 3437, 5389, 8347, 37723, 58429, 155647, 1089529, 2645999, 18521993]

約数ペア:

[(1, 18521993), (7, 2645999), (17, 1089529), (119, 155647), (317, 58429), (491, 37723), (2219, 8347), (3437, 5389)]