21000649677

素因数分解:

$3^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{263}}^1\times {\mathrm{15149}}^1$

素因数の和:15673

約数の個数: 32

約数和(自身を含む): 32252774400

約数和(自身を除く): 11252124723

約数列:

[1, 3, 7, 21, 251, 263, 753, 789, 1757, 1841, 5271, 5523, 15149, 45447, 66013, 106043, 198039, 318129, 462091, 1386273, 3802399, 3984187, 11407197, 11952561, 26616793, 27889309, 79850379, 83667927, 1000030937, 3000092811, 7000216559, 21000649677]

約数ペア:

[(1, 21000649677), (3, 7000216559), (7, 3000092811), (21, 1000030937), (251, 83667927), (263, 79850379), (753, 27889309), (789, 26616793), (1757, 11952561), (1841, 11407197), (5271, 3984187), (5523, 3802399), (15149, 1386273), (45447, 462091), (66013, 318129), (106043, 198039)]