81287560

素因数分解:

$2^3\times 5^1\times {\mathrm{571}}^1\times {\mathrm{3559}}^1$

素因数の和:4141

約数の個数: 32

約数和(自身を含む): 183268800

約数和(自身を除く): 101981240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 571, 1142, 2284, 2855, 3559, 4568, 5710, 7118, 11420, 14236, 17795, 22840, 28472, 35590, 71180, 142360, 2032189, 4064378, 8128756, 10160945, 16257512, 20321890, 40643780, 81287560]

約数ペア:

[(1, 81287560), (2, 40643780), (4, 20321890), (5, 16257512), (8, 10160945), (10, 8128756), (20, 4064378), (40, 2032189), (571, 142360), (1142, 71180), (2284, 35590), (2855, 28472), (3559, 22840), (4568, 17795), (5710, 14236), (7118, 11420)]