21808890

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{443}}^1\times {\mathrm{547}}^1$

素因数の和:1003

約数の個数: 48

約数和(自身を含む): 56935008

約数和(自身を除く): 35126118

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 443, 547, 886, 1094, 1329, 1641, 2215, 2658, 2735, 3282, 3987, 4430, 4923, 5470, 6645, 7974, 8205, 9846, 13290, 16410, 19935, 24615, 39870, 49230, 242321, 484642, 726963, 1211605, 1453926, 2180889, 2423210, 3634815, 4361778, 7269630, 10904445, 21808890]

約数ペア:

[(1, 21808890), (2, 10904445), (3, 7269630), (5, 4361778), (6, 3634815), (9, 2423210), (10, 2180889), (15, 1453926), (18, 1211605), (30, 726963), (45, 484642), (90, 242321), (443, 49230), (547, 39870), (886, 24615), (1094, 19935), (1329, 16410), (1641, 13290), (2215, 9846), (2658, 8205), (2735, 7974), (3282, 6645), (3987, 5470), (4430, 4923)]