20686480

素因数分解:

$2^4\times 5^1\times {\mathrm{258581}}^1$

素因数の和:258594

約数の個数: 20

約数和(自身を含む): 48096252

約数和(自身を除く): 27409772

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 258581, 517162, 1034324, 1292905, 2068648, 2585810, 4137296, 5171620, 10343240, 20686480]

約数ペア:

[(1, 20686480), (2, 10343240), (4, 5171620), (5, 4137296), (8, 2585810), (10, 2068648), (16, 1292905), (20, 1034324), (40, 517162), (80, 258581)]