212121987

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{22397}}^1$

素因数の和:22459

約数の個数: 32

約数和(自身を含む): 361234944

約数和(自身を除く): 149112957

約数列:

[1, 3, 7, 11, 21, 33, 41, 77, 123, 231, 287, 451, 861, 1353, 3157, 9471, 22397, 67191, 156779, 246367, 470337, 739101, 918277, 1724569, 2754831, 5173707, 6427939, 10101047, 19283817, 30303141, 70707329, 212121987]

約数ペア:

[(1, 212121987), (3, 70707329), (7, 30303141), (11, 19283817), (21, 10101047), (33, 6427939), (41, 5173707), (77, 2754831), (123, 1724569), (231, 918277), (287, 739101), (451, 470337), (861, 246367), (1353, 156779), (3157, 67191), (9471, 22397)]