18401540

素因数分解:

$2^2\times 5^1\times {\mathrm{653}}^1\times {\mathrm{1409}}^1$

素因数の和:2071

約数の個数: 24

約数和(自身を含む): 38729880

約数和(自身を除く): 20328340

約数列:

[1, 2, 4, 5, 10, 20, 653, 1306, 1409, 2612, 2818, 3265, 5636, 6530, 7045, 13060, 14090, 28180, 920077, 1840154, 3680308, 4600385, 9200770, 18401540]

約数ペア:

[(1, 18401540), (2, 9200770), (4, 4600385), (5, 3680308), (10, 1840154), (20, 920077), (653, 28180), (1306, 14090), (1409, 13060), (2612, 7045), (2818, 6530), (3265, 5636)]