21439740

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51047}}^1$

素因数の和:51066

約数の個数: 48

約数和(自身を含む): 68608512

約数和(自身を除く): 47168772

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 51047, 102094, 153141, 204188, 255235, 306282, 357329, 510470, 612564, 714658, 765705, 1020940, 1071987, 1429316, 1531410, 1786645, 2143974, 3062820, 3573290, 4287948, 5359935, 7146580, 10719870, 21439740]

約数ペア:

[(1, 21439740), (2, 10719870), (3, 7146580), (4, 5359935), (5, 4287948), (6, 3573290), (7, 3062820), (10, 2143974), (12, 1786645), (14, 1531410), (15, 1429316), (20, 1071987), (21, 1020940), (28, 765705), (30, 714658), (35, 612564), (42, 510470), (60, 357329), (70, 306282), (84, 255235), (105, 204188), (140, 153141), (210, 102094), (420, 51047)]