20898801

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{569}}^1$

素因数の和:646

約数の個数: 48

約数和(自身を含む): 38413440

約数和(自身を除く): 17514639

約数列:

[1, 3, 7, 9, 11, 21, 33, 53, 63, 77, 99, 159, 231, 371, 477, 569, 583, 693, 1113, 1707, 1749, 3339, 3983, 4081, 5121, 5247, 6259, 11949, 12243, 18777, 30157, 35847, 36729, 43813, 56331, 90471, 131439, 211099, 271413, 331727, 394317, 633297, 995181, 1899891, 2322089, 2985543, 6966267, 20898801]

約数ペア:

[(1, 20898801), (3, 6966267), (7, 2985543), (9, 2322089), (11, 1899891), (21, 995181), (33, 633297), (53, 394317), (63, 331727), (77, 271413), (99, 211099), (159, 131439), (231, 90471), (371, 56331), (477, 43813), (569, 36729), (583, 35847), (693, 30157), (1113, 18777), (1707, 12243), (1749, 11949), (3339, 6259), (3983, 5247), (4081, 5121)]