21491240

素因数分解:

$2^3\times 5^1\times {\mathrm{537281}}^1$

素因数の和:537292

約数の個数: 16

約数和(自身を含む): 48355380

約数和(自身を除く): 26864140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 537281, 1074562, 2149124, 2686405, 4298248, 5372810, 10745620, 21491240]

約数ペア:

[(1, 21491240), (2, 10745620), (4, 5372810), (5, 4298248), (8, 2686405), (10, 2149124), (20, 1074562), (40, 537281)]