21000518

素因数分解:

$2^1\times 7^3\times {\mathrm{11}}^3\times {\mathrm{23}}^1$

素因数の和:79

約数の個数: 64

約数和(自身を含む): 42163200

約数和(自身を除く): 21162682

約数列:

[1, 2, 7, 11, 14, 22, 23, 46, 49, 77, 98, 121, 154, 161, 242, 253, 322, 343, 506, 539, 686, 847, 1078, 1127, 1331, 1694, 1771, 2254, 2662, 2783, 3542, 3773, 5566, 5929, 7546, 7889, 9317, 11858, 12397, 15778, 18634, 19481, 24794, 30613, 38962, 41503, 61226, 65219, 83006, 86779, 130438, 136367, 173558, 214291, 272734, 428582, 456533, 913066, 954569, 1500037, 1909138, 3000074, 10500259, 21000518]

約数ペア:

[(1, 21000518), (2, 10500259), (7, 3000074), (11, 1909138), (14, 1500037), (22, 954569), (23, 913066), (46, 456533), (49, 428582), (77, 272734), (98, 214291), (121, 173558), (154, 136367), (161, 130438), (242, 86779), (253, 83006), (322, 65219), (343, 61226), (506, 41503), (539, 38962), (686, 30613), (847, 24794), (1078, 19481), (1127, 18634), (1331, 15778), (1694, 12397), (1771, 11858), (2254, 9317), (2662, 7889), (2783, 7546), (3542, 5929), (3773, 5566)]