21106820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{1409}}^1$

素因数の和:1532

約数の個数: 48

約数和(自身を含む): 51166080

約数和(自身を除く): 30059260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 107, 140, 214, 428, 535, 749, 1070, 1409, 1498, 2140, 2818, 2996, 3745, 5636, 7045, 7490, 9863, 14090, 14980, 19726, 28180, 39452, 49315, 98630, 150763, 197260, 301526, 603052, 753815, 1055341, 1507630, 2110682, 3015260, 4221364, 5276705, 10553410, 21106820]

約数ペア:

[(1, 21106820), (2, 10553410), (4, 5276705), (5, 4221364), (7, 3015260), (10, 2110682), (14, 1507630), (20, 1055341), (28, 753815), (35, 603052), (70, 301526), (107, 197260), (140, 150763), (214, 98630), (428, 49315), (535, 39452), (749, 28180), (1070, 19726), (1409, 14980), (1498, 14090), (2140, 9863), (2818, 7490), (2996, 7045), (3745, 5636)]