21449720

素因数分解:

$2^3\times 5^1\times {\mathrm{536243}}^1$

素因数の和:536254

約数の個数: 16

約数和(自身を含む): 48261960

約数和(自身を除く): 26812240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 536243, 1072486, 2144972, 2681215, 4289944, 5362430, 10724860, 21449720]

約数ペア:

[(1, 21449720), (2, 10724860), (4, 5362430), (5, 4289944), (8, 2681215), (10, 2144972), (20, 1072486), (40, 536243)]