20367560

素因数分解:

$2^3\times 5^1\times {\mathrm{647}}^1\times {\mathrm{787}}^1$

素因数の和:1445

約数の個数: 32

約数和(自身を含む): 45956160

約数和(自身を除く): 25588600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 647, 787, 1294, 1574, 2588, 3148, 3235, 3935, 5176, 6296, 6470, 7870, 12940, 15740, 25880, 31480, 509189, 1018378, 2036756, 2545945, 4073512, 5091890, 10183780, 20367560]

約数ペア:

[(1, 20367560), (2, 10183780), (4, 5091890), (5, 4073512), (8, 2545945), (10, 2036756), (20, 1018378), (40, 509189), (647, 31480), (787, 25880), (1294, 15740), (1574, 12940), (2588, 7870), (3148, 6470), (3235, 6296), (3935, 5176)]