21716560

素因数分解:

$2^4\times 5^1\times {\mathrm{353}}^1\times {\mathrm{769}}^1$

素因数の和:1135

約数の個数: 40

約数和(自身を含む): 50699880

約数和(自身を除く): 28983320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 353, 706, 769, 1412, 1538, 1765, 2824, 3076, 3530, 3845, 5648, 6152, 7060, 7690, 12304, 14120, 15380, 28240, 30760, 61520, 271457, 542914, 1085828, 1357285, 2171656, 2714570, 4343312, 5429140, 10858280, 21716560]

約数ペア:

[(1, 21716560), (2, 10858280), (4, 5429140), (5, 4343312), (8, 2714570), (10, 2171656), (16, 1357285), (20, 1085828), (40, 542914), (80, 271457), (353, 61520), (706, 30760), (769, 28240), (1412, 15380), (1538, 14120), (1765, 12304), (2824, 7690), (3076, 7060), (3530, 6152), (3845, 5648)]