81118160

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{11393}}^1$

素因数の和:11495

約数の個数: 40

約数和(自身を含む): 190735560

約数和(自身を除く): 109617400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 3560, 7120, 11393, 22786, 45572, 56965, 91144, 113930, 182288, 227860, 455720, 911440, 1013977, 2027954, 4055908, 5069885, 8111816, 10139770, 16223632, 20279540, 40559080, 81118160]

約数ペア:

[(1, 81118160), (2, 40559080), (4, 20279540), (5, 16223632), (8, 10139770), (10, 8111816), (16, 5069885), (20, 4055908), (40, 2027954), (80, 1013977), (89, 911440), (178, 455720), (356, 227860), (445, 182288), (712, 113930), (890, 91144), (1424, 56965), (1780, 45572), (3560, 22786), (7120, 11393)]