20805645

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{28307}}^1$

素因数の和:28329

約数の個数: 24

約数和(自身を含む): 38725344

約数和(自身を除く): 17919699

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 735, 28307, 84921, 141535, 198149, 424605, 594447, 990745, 1387043, 2972235, 4161129, 6935215, 20805645]

約数ペア:

[(1, 20805645), (3, 6935215), (5, 4161129), (7, 2972235), (15, 1387043), (21, 990745), (35, 594447), (49, 424605), (105, 198149), (147, 141535), (245, 84921), (735, 28307)]