21393955

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{10513}}^1$

素因数の和:10566

約数の個数: 16

約数和(自身を含む): 28766304

約数和(自身を除く): 7372349

約数列:

[1, 5, 11, 37, 55, 185, 407, 2035, 10513, 52565, 115643, 388981, 578215, 1944905, 4278791, 21393955]

約数ペア:

[(1, 21393955), (5, 4278791), (11, 1944905), (37, 578215), (55, 388981), (185, 115643), (407, 52565), (2035, 10513)]