21789908

素因数分解:

$2^2\times 7^2\times {\mathrm{107}}^1\times {\mathrm{1039}}^1$

素因数の和:1164

約数の個数: 36

約数和(自身を含む): 44815680

約数和(自身を除く): 23025772

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 107, 196, 214, 428, 749, 1039, 1498, 2078, 2996, 4156, 5243, 7273, 10486, 14546, 20972, 29092, 50911, 101822, 111173, 203644, 222346, 444692, 778211, 1556422, 3112844, 5447477, 10894954, 21789908]

約数ペア:

[(1, 21789908), (2, 10894954), (4, 5447477), (7, 3112844), (14, 1556422), (28, 778211), (49, 444692), (98, 222346), (107, 203644), (196, 111173), (214, 101822), (428, 50911), (749, 29092), (1039, 20972), (1498, 14546), (2078, 10486), (2996, 7273), (4156, 5243)]