81213975

素因数分解:

$3^3\times 5^2\times {\mathrm{79}}^1\times {\mathrm{1523}}^1$

素因数の和:1621

約数の個数: 48

約数和(自身を含む): 151180800

約数和(自身を除く): 69966825

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 79, 135, 225, 237, 395, 675, 711, 1185, 1523, 1975, 2133, 3555, 4569, 5925, 7615, 10665, 13707, 17775, 22845, 38075, 41121, 53325, 68535, 114225, 120317, 205605, 342675, 360951, 601585, 1028025, 1082853, 1804755, 3007925, 3248559, 5414265, 9023775, 16242795, 27071325, 81213975]

約数ペア:

[(1, 81213975), (3, 27071325), (5, 16242795), (9, 9023775), (15, 5414265), (25, 3248559), (27, 3007925), (45, 1804755), (75, 1082853), (79, 1028025), (135, 601585), (225, 360951), (237, 342675), (395, 205605), (675, 120317), (711, 114225), (1185, 68535), (1523, 53325), (1975, 41121), (2133, 38075), (3555, 22845), (4569, 17775), (5925, 13707), (7615, 10665)]