21196980

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16823}}^1$

素因数の和:16845

約数の個数: 72

約数和(自身を含む): 73487232

約数和(自身を除く): 52290252

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16823, 33646, 50469, 67292, 84115, 100938, 117761, 151407, 168230, 201876, 235522, 252345, 302814, 336460, 353283, 471044, 504690, 588805, 605628, 706566, 757035, 1009380, 1059849, 1177610, 1413132, 1514070, 1766415, 2119698, 2355220, 3028140, 3532830, 4239396, 5299245, 7065660, 10598490, 21196980]

約数ペア:

[(1, 21196980), (2, 10598490), (3, 7065660), (4, 5299245), (5, 4239396), (6, 3532830), (7, 3028140), (9, 2355220), (10, 2119698), (12, 1766415), (14, 1514070), (15, 1413132), (18, 1177610), (20, 1059849), (21, 1009380), (28, 757035), (30, 706566), (35, 605628), (36, 588805), (42, 504690), (45, 471044), (60, 353283), (63, 336460), (70, 302814), (84, 252345), (90, 235522), (105, 201876), (126, 168230), (140, 151407), (180, 117761), (210, 100938), (252, 84115), (315, 67292), (420, 50469), (630, 33646), (1260, 16823)]