21328020

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16927}}^1$

素因数の和:16949

約数の個数: 72

約数和(自身を含む): 73941504

約数和(自身を除く): 52613484

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, 16927, 33854, 50781, 67708, 84635, 101562, 118489, 152343, 169270, 203124, 236978, 253905, 304686, 338540, 355467, 473956, 507810, 592445, 609372, 710934, 761715, 1015620, 1066401, 1184890, 1421868, 1523430, 1777335, 2132802, 2369780, 3046860, 3554670, 4265604, 5332005, 7109340, 10664010, 21328020]

約数ペア:

[(1, 21328020), (2, 10664010), (3, 7109340), (4, 5332005), (5, 4265604), (6, 3554670), (7, 3046860), (9, 2369780), (10, 2132802), (12, 1777335), (14, 1523430), (15, 1421868), (18, 1184890), (20, 1066401), (21, 1015620), (28, 761715), (30, 710934), (35, 609372), (36, 592445), (42, 507810), (45, 473956), (60, 355467), (63, 338540), (70, 304686), (84, 253905), (90, 236978), (105, 203124), (126, 169270), (140, 152343), (180, 118489), (210, 101562), (252, 84635), (315, 67708), (420, 50781), (630, 33854), (1260, 16927)]