21203907

素因数分解:

$3^1\times {\mathrm{23}}^2\times {\mathrm{31}}^1\times {\mathrm{431}}^1$

素因数の和:511

約数の個数: 24

約数和(自身を含む): 30578688

約数和(自身を除く): 9374781

約数列:

[1, 3, 23, 31, 69, 93, 431, 529, 713, 1293, 1587, 2139, 9913, 13361, 16399, 29739, 40083, 49197, 227999, 307303, 683997, 921909, 7067969, 21203907]

約数ペア:

[(1, 21203907), (3, 7067969), (23, 921909), (31, 683997), (69, 307303), (93, 227999), (431, 49197), (529, 40083), (713, 29739), (1293, 16399), (1587, 13361), (2139, 9913)]