21213780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{953}}^1$

素因数の和:1025

約数の個数: 96

約数和(自身を含む): 69237504

約数和(自身を除く): 48023724

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 53, 60, 70, 84, 105, 106, 140, 159, 210, 212, 265, 318, 371, 420, 530, 636, 742, 795, 953, 1060, 1113, 1484, 1590, 1855, 1906, 2226, 2859, 3180, 3710, 3812, 4452, 4765, 5565, 5718, 6671, 7420, 9530, 11130, 11436, 13342, 14295, 19060, 20013, 22260, 26684, 28590, 33355, 40026, 50509, 57180, 66710, 80052, 100065, 101018, 133420, 151527, 200130, 202036, 252545, 303054, 353563, 400260, 505090, 606108, 707126, 757635, 1010180, 1060689, 1414252, 1515270, 1767815, 2121378, 3030540, 3535630, 4242756, 5303445, 7071260, 10606890, 21213780]

約数ペア:

[(1, 21213780), (2, 10606890), (3, 7071260), (4, 5303445), (5, 4242756), (6, 3535630), (7, 3030540), (10, 2121378), (12, 1767815), (14, 1515270), (15, 1414252), (20, 1060689), (21, 1010180), (28, 757635), (30, 707126), (35, 606108), (42, 505090), (53, 400260), (60, 353563), (70, 303054), (84, 252545), (105, 202036), (106, 200130), (140, 151527), (159, 133420), (210, 101018), (212, 100065), (265, 80052), (318, 66710), (371, 57180), (420, 50509), (530, 40026), (636, 33355), (742, 28590), (795, 26684), (953, 22260), (1060, 20013), (1113, 19060), (1484, 14295), (1590, 13342), (1855, 11436), (1906, 11130), (2226, 9530), (2859, 7420), (3180, 6671), (3710, 5718), (3812, 5565), (4452, 4765)]