257742940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{20231}}^1$

素因数の和:20267

約数の個数: 72

約数和(自身を含む): 678095712

約数和(自身を除く): 420352772

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 910, 980, 1274, 1820, 2548, 3185, 6370, 12740, 20231, 40462, 80924, 101155, 141617, 202310, 263003, 283234, 404620, 526006, 566468, 708085, 991319, 1052012, 1315015, 1416170, 1841021, 1982638, 2630030, 2832340, 3682042, 3965276, 4956595, 5260060, 7364084, 9205105, 9913190, 12887147, 18410210, 19826380, 25774294, 36820420, 51548588, 64435735, 128871470, 257742940]

約数ペア:

[(1, 257742940), (2, 128871470), (4, 64435735), (5, 51548588), (7, 36820420), (10, 25774294), (13, 19826380), (14, 18410210), (20, 12887147), (26, 9913190), (28, 9205105), (35, 7364084), (49, 5260060), (52, 4956595), (65, 3965276), (70, 3682042), (91, 2832340), (98, 2630030), (130, 1982638), (140, 1841021), (182, 1416170), (196, 1315015), (245, 1052012), (260, 991319), (364, 708085), (455, 566468), (490, 526006), (637, 404620), (910, 283234), (980, 263003), (1274, 202310), (1820, 141617), (2548, 101155), (3185, 80924), (6370, 40462), (12740, 20231)]