21269709

素因数分解:

$3^4\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{151}}^1$

素因数の和:247

約数の個数: 40

約数和(自身を含む): 33547008

約数和(自身を除く): 12277299

約数列:

[1, 3, 9, 27, 37, 47, 81, 111, 141, 151, 333, 423, 453, 999, 1269, 1359, 1739, 2997, 3807, 4077, 5217, 5587, 7097, 12231, 15651, 16761, 21291, 46953, 50283, 63873, 140859, 150849, 191619, 262589, 452547, 574857, 787767, 2363301, 7089903, 21269709]

約数ペア:

[(1, 21269709), (3, 7089903), (9, 2363301), (27, 787767), (37, 574857), (47, 452547), (81, 262589), (111, 191619), (141, 150849), (151, 140859), (333, 63873), (423, 50283), (453, 46953), (999, 21291), (1269, 16761), (1359, 15651), (1739, 12231), (2997, 7097), (3807, 5587), (4077, 5217)]