21390356

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{127}}^1$

素因数の和:264

約数の個数: 48

約数和(自身を含む): 42147840

約数和(自身を除く): 20757484

約数列:

[1, 2, 4, 13, 26, 41, 52, 79, 82, 127, 158, 164, 254, 316, 508, 533, 1027, 1066, 1651, 2054, 2132, 3239, 3302, 4108, 5207, 6478, 6604, 10033, 10414, 12956, 20066, 20828, 40132, 42107, 67691, 84214, 130429, 135382, 168428, 260858, 270764, 411353, 521716, 822706, 1645412, 5347589, 10695178, 21390356]

約数ペア:

[(1, 21390356), (2, 10695178), (4, 5347589), (13, 1645412), (26, 822706), (41, 521716), (52, 411353), (79, 270764), (82, 260858), (127, 168428), (158, 135382), (164, 130429), (254, 84214), (316, 67691), (508, 42107), (533, 40132), (1027, 20828), (1066, 20066), (1651, 12956), (2054, 10414), (2132, 10033), (3239, 6604), (3302, 6478), (4108, 5207)]