21451880

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{18493}}^1$

素因数の和:18533

約数の個数: 32

約数和(自身を含む): 49933800

約数和(自身を除く): 28481920

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 18493, 36986, 73972, 92465, 147944, 184930, 369860, 536297, 739720, 1072594, 2145188, 2681485, 4290376, 5362970, 10725940, 21451880]

約数ペア:

[(1, 21451880), (2, 10725940), (4, 5362970), (5, 4290376), (8, 2681485), (10, 2145188), (20, 1072594), (29, 739720), (40, 536297), (58, 369860), (116, 184930), (145, 147944), (232, 92465), (290, 73972), (580, 36986), (1160, 18493)]