21701840

素因数分解:

$2^4\times 5^1\times {\mathrm{271273}}^1$

素因数の和:271286

約数の個数: 20

約数和(自身を含む): 50456964

約数和(自身を除く): 28755124

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 271273, 542546, 1085092, 1356365, 2170184, 2712730, 4340368, 5425460, 10850920, 21701840]

約数ペア:

[(1, 21701840), (2, 10850920), (4, 5425460), (5, 4340368), (8, 2712730), (10, 2170184), (16, 1356365), (20, 1085092), (40, 542546), (80, 271273)]