21377775

素因数分解:

$3^1\times 5^2\times {\mathrm{149}}^1\times {\mathrm{1913}}^1$

素因数の和:2075

約数の個数: 24

約数和(自身を含む): 35600400

約数和(自身を除く): 14222625

約数列:

[1, 3, 5, 15, 25, 75, 149, 447, 745, 1913, 2235, 3725, 5739, 9565, 11175, 28695, 47825, 143475, 285037, 855111, 1425185, 4275555, 7125925, 21377775]

約数ペア:

[(1, 21377775), (3, 7125925), (5, 4275555), (15, 1425185), (25, 855111), (75, 285037), (149, 143475), (447, 47825), (745, 28695), (1913, 11175), (2235, 9565), (3725, 5739)]