21813775

素因数分解:

$5^2\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{643}}^1$

素因数の和:735

約数の個数: 24

約数和(自身を含む): 28748160

約数和(自身を除く): 6934385

約数列:

[1, 5, 23, 25, 59, 115, 295, 575, 643, 1357, 1475, 3215, 6785, 14789, 16075, 33925, 37937, 73945, 189685, 369725, 872551, 948425, 4362755, 21813775]

約数ペア:

[(1, 21813775), (5, 4362755), (23, 948425), (25, 872551), (59, 369725), (115, 189685), (295, 73945), (575, 37937), (643, 33925), (1357, 16075), (1475, 14789), (3215, 6785)]