20784645

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{65983}}^1$

素因数の和:66001

約数の個数: 24

約数和(自身を含む): 41174016

約数和(自身を除く): 20389371

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 65983, 197949, 329915, 461881, 593847, 989745, 1385643, 2309405, 2969235, 4156929, 6928215, 20784645]

約数ペア:

[(1, 20784645), (3, 6928215), (5, 4156929), (7, 2969235), (9, 2309405), (15, 1385643), (21, 989745), (35, 593847), (45, 461881), (63, 329915), (105, 197949), (315, 65983)]