21567819

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{397}}^1$

素因数の和:619

約数の個数: 32

約数和(自身を含む): 35660800

約数和(自身を除く): 14092981

約数列:

[1, 3, 7, 13, 21, 39, 91, 199, 273, 397, 597, 1191, 1393, 2587, 2779, 4179, 5161, 7761, 8337, 15483, 18109, 36127, 54327, 79003, 108381, 237009, 553021, 1027039, 1659063, 3081117, 7189273, 21567819]

約数ペア:

[(1, 21567819), (3, 7189273), (7, 3081117), (13, 1659063), (21, 1027039), (39, 553021), (91, 237009), (199, 108381), (273, 79003), (397, 54327), (597, 36127), (1191, 18109), (1393, 15483), (2587, 8337), (2779, 7761), (4179, 5161)]