21055220

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^2\times {\mathrm{769}}^1$

素因数の和:852

約数の個数: 36

約数和(自身を含む): 45502380

約数和(自身を除く): 24447160

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 148, 185, 370, 740, 769, 1369, 1538, 2738, 3076, 3845, 5476, 6845, 7690, 13690, 15380, 27380, 28453, 56906, 113812, 142265, 284530, 569060, 1052761, 2105522, 4211044, 5263805, 10527610, 21055220]

約数ペア:

[(1, 21055220), (2, 10527610), (4, 5263805), (5, 4211044), (10, 2105522), (20, 1052761), (37, 569060), (74, 284530), (148, 142265), (185, 113812), (370, 56906), (740, 28453), (769, 27380), (1369, 15380), (1538, 13690), (2738, 7690), (3076, 6845), (3845, 5476)]