21327831

素因数分解:

$3^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{359}}^1$

素因数の和:436

約数の個数: 48

約数和(自身を含む): 37739520

約数和(自身を除く): 16411689

約数列:

[1, 3, 7, 9, 21, 23, 41, 63, 69, 123, 161, 207, 287, 359, 369, 483, 861, 943, 1077, 1449, 2513, 2583, 2829, 3231, 6601, 7539, 8257, 8487, 14719, 19803, 22617, 24771, 44157, 57799, 59409, 74313, 103033, 132471, 173397, 309099, 338537, 520191, 927297, 1015611, 2369759, 3046833, 7109277, 21327831]

約数ペア:

[(1, 21327831), (3, 7109277), (7, 3046833), (9, 2369759), (21, 1015611), (23, 927297), (41, 520191), (63, 338537), (69, 309099), (123, 173397), (161, 132471), (207, 103033), (287, 74313), (359, 59409), (369, 57799), (483, 44157), (861, 24771), (943, 22617), (1077, 19803), (1449, 14719), (2513, 8487), (2583, 8257), (2829, 7539), (3231, 6601)]