20977740

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16649}}^1$

素因数の和:16671

約数の個数: 72

約数和(自身を含む): 72727200

約数和(自身を除く): 51749460

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, 16649, 33298, 49947, 66596, 83245, 99894, 116543, 149841, 166490, 199788, 233086, 249735, 299682, 332980, 349629, 466172, 499470, 582715, 599364, 699258, 749205, 998940, 1048887, 1165430, 1398516, 1498410, 1748145, 2097774, 2330860, 2996820, 3496290, 4195548, 5244435, 6992580, 10488870, 20977740]

約数ペア:

[(1, 20977740), (2, 10488870), (3, 6992580), (4, 5244435), (5, 4195548), (6, 3496290), (7, 2996820), (9, 2330860), (10, 2097774), (12, 1748145), (14, 1498410), (15, 1398516), (18, 1165430), (20, 1048887), (21, 998940), (28, 749205), (30, 699258), (35, 599364), (36, 582715), (42, 499470), (45, 466172), (60, 349629), (63, 332980), (70, 299682), (84, 249735), (90, 233086), (105, 199788), (126, 166490), (140, 149841), (180, 116543), (210, 99894), (252, 83245), (315, 66596), (420, 49947), (630, 33298), (1260, 16649)]