21148005

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{137}}^1\times {\mathrm{251}}^1$

素因数の和:437

約数の個数: 32

約数和(自身を含む): 35054208

約数和(自身を除く): 13906203

約数列:

[1, 3, 5, 15, 41, 123, 137, 205, 251, 411, 615, 685, 753, 1255, 2055, 3765, 5617, 10291, 16851, 28085, 30873, 34387, 51455, 84255, 103161, 154365, 171935, 515805, 1409867, 4229601, 7049335, 21148005]

約数ペア:

[(1, 21148005), (3, 7049335), (5, 4229601), (15, 1409867), (41, 515805), (123, 171935), (137, 154365), (205, 103161), (251, 84255), (411, 51455), (615, 34387), (685, 30873), (753, 28085), (1255, 16851), (2055, 10291), (3765, 5617)]