21839139

素因数分解:

$3^5\times 7^1\times {\mathrm{37}}^1\times {\mathrm{347}}^1$

素因数の和:406

約数の個数: 48

約数和(自身を含む): 38508288

約数和(自身を除く): 16669149

約数列:

[1, 3, 7, 9, 21, 27, 37, 63, 81, 111, 189, 243, 259, 333, 347, 567, 777, 999, 1041, 1701, 2331, 2429, 2997, 3123, 6993, 7287, 8991, 9369, 12839, 20979, 21861, 28107, 38517, 62937, 65583, 84321, 89873, 115551, 196749, 269619, 346653, 590247, 808857, 1039959, 2426571, 3119877, 7279713, 21839139]

約数ペア:

[(1, 21839139), (3, 7279713), (7, 3119877), (9, 2426571), (21, 1039959), (27, 808857), (37, 590247), (63, 346653), (81, 269619), (111, 196749), (189, 115551), (243, 89873), (259, 84321), (333, 65583), (347, 62937), (567, 38517), (777, 28107), (999, 21861), (1041, 20979), (1701, 12839), (2331, 9369), (2429, 8991), (2997, 7287), (3123, 6993)]