219745480

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{251}}^1\times {\mathrm{509}}^1$

素因数の和:814

約数の個数: 64

約数和(自身を含む): 508939200

約数和(自身を除く): 289193720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 251, 344, 430, 502, 509, 860, 1004, 1018, 1255, 1720, 2008, 2036, 2510, 2545, 4072, 5020, 5090, 10040, 10180, 10793, 20360, 21586, 21887, 43172, 43774, 53965, 86344, 87548, 107930, 109435, 127759, 175096, 215860, 218870, 255518, 431720, 437740, 511036, 638795, 875480, 1022072, 1277590, 2555180, 5110360, 5493637, 10987274, 21974548, 27468185, 43949096, 54936370, 109872740, 219745480]

約数ペア:

[(1, 219745480), (2, 109872740), (4, 54936370), (5, 43949096), (8, 27468185), (10, 21974548), (20, 10987274), (40, 5493637), (43, 5110360), (86, 2555180), (172, 1277590), (215, 1022072), (251, 875480), (344, 638795), (430, 511036), (502, 437740), (509, 431720), (860, 255518), (1004, 218870), (1018, 215860), (1255, 175096), (1720, 127759), (2008, 109435), (2036, 107930), (2510, 87548), (2545, 86344), (4072, 53965), (5020, 43774), (5090, 43172), (10040, 21887), (10180, 21586), (10793, 20360)]