81563979

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^2\times {\mathrm{29}}^1\times {\mathrm{53}}^1$

素因数の和:137

約数の個数: 72

約数和(自身を含む): 140726160

約数和(自身を除く): 59162181

約数列:

[1, 3, 7, 19, 21, 29, 49, 53, 57, 87, 133, 147, 159, 203, 361, 371, 399, 551, 609, 931, 1007, 1083, 1113, 1421, 1537, 1653, 2527, 2597, 2793, 3021, 3857, 4263, 4611, 7049, 7581, 7791, 10469, 10759, 11571, 17689, 19133, 21147, 26999, 29203, 31407, 32277, 49343, 53067, 57399, 73283, 75313, 80997, 87609, 133931, 148029, 204421, 219849, 225939, 401793, 512981, 554857, 613263, 937517, 1430947, 1538943, 1664571, 2812551, 3883999, 4292841, 11651997, 27187993, 81563979]

約数ペア:

[(1, 81563979), (3, 27187993), (7, 11651997), (19, 4292841), (21, 3883999), (29, 2812551), (49, 1664571), (53, 1538943), (57, 1430947), (87, 937517), (133, 613263), (147, 554857), (159, 512981), (203, 401793), (361, 225939), (371, 219849), (399, 204421), (551, 148029), (609, 133931), (931, 87609), (1007, 80997), (1083, 75313), (1113, 73283), (1421, 57399), (1537, 53067), (1653, 49343), (2527, 32277), (2597, 31407), (2793, 29203), (3021, 26999), (3857, 21147), (4263, 19133), (4611, 17689), (7049, 11571), (7581, 10759), (7791, 10469)]